diff --git a/python/core/qgsdiagramrenderer.sip b/python/core/qgsdiagramrenderer.sip
index 91d9c7ba98b..86e788a2f57 100644
--- a/python/core/qgsdiagramrenderer.sip
+++ b/python/core/qgsdiagramrenderer.sip
@@ -11,7 +11,6 @@
 
 
 
-
 class QgsDiagramLayerSettings
 {
 %Docstring
diff --git a/python/core/qgspropertytransformer.sip b/python/core/qgspropertytransformer.sip
index 1d22fa07f83..1d1e1d59b7a 100644
--- a/python/core/qgspropertytransformer.sip
+++ b/python/core/qgspropertytransformer.sip
@@ -339,11 +339,6 @@ class QgsGenericNumericTransformer : QgsPropertyTransformer
  \param exponent optional exponential for non-linear scaling
 %End
 
-    QgsGenericNumericTransformer( const QgsGenericNumericTransformer &other );
-%Docstring
- Copy constructor.
-%End
-
     virtual Type transformerType() const;
     virtual QgsGenericNumericTransformer *clone() const /Factory/;
     virtual QVariant toVariant() const;
@@ -475,11 +470,6 @@ class QgsSizeScaleTransformer : QgsPropertyTransformer
  \param exponent exponent for Exponential scaling method
 %End
 
-    QgsSizeScaleTransformer( const QgsSizeScaleTransformer &other );
-%Docstring
- Copy constructor.
-%End
-
     virtual Type transformerType() const;
     virtual QgsSizeScaleTransformer *clone() const /Factory/;
     virtual QVariant toVariant() const;
diff --git a/python/core/symbology/qgscategorizedsymbolrenderer.sip b/python/core/symbology/qgscategorizedsymbolrenderer.sip
index 0fd0d34dbae..10e4a2cc31f 100644
--- a/python/core/symbology/qgscategorizedsymbolrenderer.sip
+++ b/python/core/symbology/qgscategorizedsymbolrenderer.sip
@@ -78,7 +78,6 @@ class QgsCategorizedSymbolRenderer : QgsFeatureRenderer
   public:
 
     QgsCategorizedSymbolRenderer( const QString &attrName = QString(), const QgsCategoryList &categories = QgsCategoryList() );
-    ~QgsCategorizedSymbolRenderer();
 
     virtual QgsSymbol *symbolForFeature( QgsFeature &feature, QgsRenderContext &context );
     virtual QgsSymbol *originalSymbolForFeature( QgsFeature &feature, QgsRenderContext &context );
diff --git a/python/core/symbology/qgssinglesymbolrenderer.sip b/python/core/symbology/qgssinglesymbolrenderer.sip
index 622bfbb576d..4a3118fa20a 100644
--- a/python/core/symbology/qgssinglesymbolrenderer.sip
+++ b/python/core/symbology/qgssinglesymbolrenderer.sip
@@ -17,7 +17,6 @@ class QgsSingleSymbolRenderer : QgsFeatureRenderer
   public:
 
     QgsSingleSymbolRenderer( QgsSymbol *symbol /Transfer/ );
-    ~QgsSingleSymbolRenderer();
 
     virtual QgsSymbol *symbolForFeature( QgsFeature &feature, QgsRenderContext &context );
     virtual QgsSymbol *originalSymbolForFeature( QgsFeature &feature, QgsRenderContext &context );
diff --git a/python/gui/attributetable/qgsfeaturelistmodel.sip b/python/gui/attributetable/qgsfeaturelistmodel.sip
index 64c048cade2..21158c08896 100644
--- a/python/gui/attributetable/qgsfeaturelistmodel.sip
+++ b/python/gui/attributetable/qgsfeaturelistmodel.sip
@@ -34,7 +34,6 @@ class QgsFeatureListModel : QAbstractProxyModel, QgsFeatureModel
 
   public:
     explicit QgsFeatureListModel( QgsAttributeTableFilterModel *sourceModel, QObject *parent /TransferThis/ = 0 );
-    virtual ~QgsFeatureListModel();
 
     virtual void setSourceModel( QgsAttributeTableFilterModel *sourceModel );
     QgsVectorLayerCache *layerCache();
diff --git a/python/gui/attributetable/qgsfieldconditionalformatwidget.sip b/python/gui/attributetable/qgsfieldconditionalformatwidget.sip
index aee3cc4ffdf..195d7f63bd6 100644
--- a/python/gui/attributetable/qgsfieldconditionalformatwidget.sip
+++ b/python/gui/attributetable/qgsfieldconditionalformatwidget.sip
@@ -28,8 +28,6 @@ class QgsFieldConditionalFormatWidget : QWidget
  \param parent parent widget
 %End
 
-    ~QgsFieldConditionalFormatWidget();
-
     void viewRules();
 %Docstring
  Switches the widget to the rules page.
diff --git a/python/gui/symbology/qgssvgselectorwidget.sip b/python/gui/symbology/qgssvgselectorwidget.sip
index 4afbab21f4d..ec430d4e64f 100644
--- a/python/gui/symbology/qgssvgselectorwidget.sip
+++ b/python/gui/symbology/qgssvgselectorwidget.sip
@@ -75,7 +75,6 @@ class QgsSvgSelectorWidget : QWidget
 %End
   public:
     QgsSvgSelectorWidget( QWidget *parent /TransferThis/ = 0 );
-    ~QgsSvgSelectorWidget();
 
     QString currentSvgPath() const;
 %Docstring
diff --git a/src/analysis/network/qgsgraph.cpp b/src/analysis/network/qgsgraph.cpp
index 07b072d22db..2ce1b5636d2 100644
--- a/src/analysis/network/qgsgraph.cpp
+++ b/src/analysis/network/qgsgraph.cpp
@@ -20,10 +20,6 @@
 
 #include "qgsgraph.h"
 
-QgsGraph::QgsGraph()
-{
-}
-
 int QgsGraph::addVertex( const QgsPointXY &pt )
 {
   mGraphVertexes.append( QgsGraphVertex( pt ) );
diff --git a/src/analysis/network/qgsgraph.h b/src/analysis/network/qgsgraph.h
index b30df6dceae..bfef5bd7ae0 100644
--- a/src/analysis/network/qgsgraph.h
+++ b/src/analysis/network/qgsgraph.h
@@ -131,7 +131,7 @@ class ANALYSIS_EXPORT QgsGraphVertex
 class ANALYSIS_EXPORT QgsGraph
 {
   public:
-    QgsGraph();
+    QgsGraph() = default;
 
     // Graph constructing methods
 
diff --git a/src/app/composer/qgsatlascompositionwidget.cpp b/src/app/composer/qgsatlascompositionwidget.cpp
index cda2b9cd105..a6ca9c05098 100644
--- a/src/app/composer/qgsatlascompositionwidget.cpp
+++ b/src/app/composer/qgsatlascompositionwidget.cpp
@@ -59,10 +59,6 @@ QgsAtlasCompositionWidget::QgsAtlasCompositionWidget( QWidget *parent, QgsCompos
   updateGuiElements();
 }
 
-QgsAtlasCompositionWidget::~QgsAtlasCompositionWidget()
-{
-}
-
 void QgsAtlasCompositionWidget::on_mUseAtlasCheckBox_stateChanged( int state )
 {
   QgsAtlasComposition *atlasMap = &mComposition->atlasComposition();
diff --git a/src/app/composer/qgsatlascompositionwidget.h b/src/app/composer/qgsatlascompositionwidget.h
index 478bbc70fdc..d6cfd56d634 100644
--- a/src/app/composer/qgsatlascompositionwidget.h
+++ b/src/app/composer/qgsatlascompositionwidget.h
@@ -31,7 +31,6 @@ class QgsAtlasCompositionWidget:
     Q_OBJECT
   public:
     QgsAtlasCompositionWidget( QWidget *parent, QgsComposition *c );
-    ~QgsAtlasCompositionWidget();
 
   public slots:
     void on_mUseAtlasCheckBox_stateChanged( int state );
diff --git a/src/app/composer/qgscomposerarrowwidget.cpp b/src/app/composer/qgscomposerarrowwidget.cpp
index dcd41284edc..75783625ecd 100644
--- a/src/app/composer/qgscomposerarrowwidget.cpp
+++ b/src/app/composer/qgscomposerarrowwidget.cpp
@@ -61,11 +61,6 @@ QgsComposerArrowWidget::QgsComposerArrowWidget( QgsComposerArrow *arrow ): QgsCo
   }
 }
 
-QgsComposerArrowWidget::~QgsComposerArrowWidget()
-{
-
-}
-
 void QgsComposerArrowWidget::on_mStrokeWidthSpinBox_valueChanged( double d )
 {
   if ( !mArrow )
diff --git a/src/app/composer/qgscomposerarrowwidget.h b/src/app/composer/qgscomposerarrowwidget.h
index cf860679e15..a9af12e2326 100644
--- a/src/app/composer/qgscomposerarrowwidget.h
+++ b/src/app/composer/qgscomposerarrowwidget.h
@@ -28,7 +28,6 @@ class QgsComposerArrowWidget: public QgsComposerItemBaseWidget, private Ui::QgsC
     Q_OBJECT
   public:
     explicit QgsComposerArrowWidget( QgsComposerArrow *arrow );
-    ~QgsComposerArrowWidget();
 
   private:
     QgsComposerArrow *mArrow = nullptr;
diff --git a/src/app/composer/qgscomposerattributetablewidget.cpp b/src/app/composer/qgscomposerattributetablewidget.cpp
index e6ee10fd56f..657a4b31603 100644
--- a/src/app/composer/qgscomposerattributetablewidget.cpp
+++ b/src/app/composer/qgscomposerattributetablewidget.cpp
@@ -114,10 +114,6 @@ QgsComposerAttributeTableWidget::QgsComposerAttributeTableWidget( QgsComposerAtt
   connect( mContentFontToolButton, &QgsFontButton::changed, this, &QgsComposerAttributeTableWidget::contentFontChanged );
 }
 
-QgsComposerAttributeTableWidget::~QgsComposerAttributeTableWidget()
-{
-}
-
 void QgsComposerAttributeTableWidget::on_mRefreshPushButton_clicked()
 {
   if ( !mComposerTable )
diff --git a/src/app/composer/qgscomposerattributetablewidget.h b/src/app/composer/qgscomposerattributetablewidget.h
index a7ee59de767..b0652c0ce36 100644
--- a/src/app/composer/qgscomposerattributetablewidget.h
+++ b/src/app/composer/qgscomposerattributetablewidget.h
@@ -29,7 +29,6 @@ class QgsComposerAttributeTableWidget: public QgsComposerItemBaseWidget, private
     Q_OBJECT
   public:
     QgsComposerAttributeTableWidget( QgsComposerAttributeTableV2 *table, QgsComposerFrame *frame );
-    ~QgsComposerAttributeTableWidget();
 
   private:
     QgsComposerAttributeTableV2 *mComposerTable = nullptr;
diff --git a/src/app/composer/qgscomposerhtmlwidget.cpp b/src/app/composer/qgscomposerhtmlwidget.cpp
index a8fd322b0bf..975a6b4c337 100644
--- a/src/app/composer/qgscomposerhtmlwidget.cpp
+++ b/src/app/composer/qgscomposerhtmlwidget.cpp
@@ -76,10 +76,6 @@ QgsComposerHtmlWidget::QgsComposerHtmlWidget()
 {
 }
 
-QgsComposerHtmlWidget::~QgsComposerHtmlWidget()
-{
-}
-
 void QgsComposerHtmlWidget::blockSignals( bool block )
 {
   mUrlLineEdit->blockSignals( block );
diff --git a/src/app/composer/qgscomposerhtmlwidget.h b/src/app/composer/qgscomposerhtmlwidget.h
index 147402b56b0..8e1da7b03fa 100644
--- a/src/app/composer/qgscomposerhtmlwidget.h
+++ b/src/app/composer/qgscomposerhtmlwidget.h
@@ -28,7 +28,6 @@ class QgsComposerHtmlWidget: public QgsComposerItemBaseWidget, private Ui::QgsCo
     Q_OBJECT
   public:
     QgsComposerHtmlWidget( QgsComposerHtml *html, QgsComposerFrame *frame );
-    ~QgsComposerHtmlWidget();
 
   private slots:
     void on_mUrlLineEdit_editingFinished();
diff --git a/src/app/composer/qgscomposeritemwidget.cpp b/src/app/composer/qgscomposeritemwidget.cpp
index b5418637efb..cb19f445962 100644
--- a/src/app/composer/qgscomposeritemwidget.cpp
+++ b/src/app/composer/qgscomposeritemwidget.cpp
@@ -40,10 +40,6 @@ QgsComposerConfigObject::QgsComposerConfigObject( QWidget *parent, QgsComposerOb
   connect( atlasComposition(), &QgsAtlasComposition::toggled, this, &QgsComposerConfigObject::updateDataDefinedButtons );
 }
 
-QgsComposerConfigObject::~QgsComposerConfigObject()
-{
-}
-
 void QgsComposerConfigObject::updateDataDefinedProperty()
 {
   //match data defined button to item's data defined property
@@ -183,11 +179,6 @@ QgsComposerItemWidget::QgsComposerItemWidget( QWidget *parent, QgsComposerItem *
     connect( mItem->composition(), &QgsComposition::variablesChanged, this, &QgsComposerItemWidget::updateVariables );
 }
 
-QgsComposerItemWidget::~QgsComposerItemWidget()
-{
-
-}
-
 void QgsComposerItemWidget::showBackgroundGroup( bool showGroup )
 {
   mBackgroundGroupBox->setVisible( showGroup );
diff --git a/src/app/composer/qgscomposeritemwidget.h b/src/app/composer/qgscomposeritemwidget.h
index 34d25b38cde..703fbb94620 100644
--- a/src/app/composer/qgscomposeritemwidget.h
+++ b/src/app/composer/qgscomposeritemwidget.h
@@ -53,7 +53,6 @@ class QgsComposerConfigObject: public QObject
     Q_OBJECT
   public:
     QgsComposerConfigObject( QWidget *parent, QgsComposerObject *composerObject );
-    ~QgsComposerConfigObject();
 
     /** Registers a data defined button, setting up its initial value, connections and description.
      * \param button button to register
@@ -126,7 +125,6 @@ class QgsComposerItemWidget: public QWidget, private Ui::QgsComposerItemWidgetBa
     Q_OBJECT
   public:
     QgsComposerItemWidget( QWidget *parent, QgsComposerItem *item );
-    ~QgsComposerItemWidget();
 
     //! A combination of upper/middle/lower and left/middle/right
     QgsComposerItem::ItemPositionMode positionMode() const;
diff --git a/src/app/composer/qgscomposerlegendlayersdialog.cpp b/src/app/composer/qgscomposerlegendlayersdialog.cpp
index 2462ae0a759..bd5c9e7768a 100644
--- a/src/app/composer/qgscomposerlegendlayersdialog.cpp
+++ b/src/app/composer/qgscomposerlegendlayersdialog.cpp
@@ -29,14 +29,9 @@ QgsComposerLegendLayersDialog::QgsComposerLegendLayersDialog( QList<QgsMapLayer
   }
 }
 
-QgsComposerLegendLayersDialog::QgsComposerLegendLayersDialog(): QDialog( nullptr )
+QgsComposerLegendLayersDialog::QgsComposerLegendLayersDialog()
+  : QDialog( nullptr )
 {
-
-}
-
-QgsComposerLegendLayersDialog::~QgsComposerLegendLayersDialog()
-{
-
 }
 
 QgsMapLayer *QgsComposerLegendLayersDialog::selectedLayer()
diff --git a/src/app/composer/qgscomposerlegendlayersdialog.h b/src/app/composer/qgscomposerlegendlayersdialog.h
index d41374c7365..40698833bd2 100644
--- a/src/app/composer/qgscomposerlegendlayersdialog.h
+++ b/src/app/composer/qgscomposerlegendlayersdialog.h
@@ -28,7 +28,7 @@ class QgsComposerLegendLayersDialog: public QDialog, private Ui::QgsComposerLege
 
   public:
     QgsComposerLegendLayersDialog( QList<QgsMapLayer *> layers, QWidget *parent = nullptr );
-    ~QgsComposerLegendLayersDialog();
+
     QgsMapLayer *selectedLayer();
 
   private:
diff --git a/src/app/composer/qgscomposerlegendwidget.cpp b/src/app/composer/qgscomposerlegendwidget.cpp
index 4f1d8c7efbc..5dde0a68de3 100644
--- a/src/app/composer/qgscomposerlegendwidget.cpp
+++ b/src/app/composer/qgscomposerlegendwidget.cpp
@@ -124,11 +124,6 @@ QgsComposerLegendWidget::QgsComposerLegendWidget(): QgsComposerItemBaseWidget( n
   setupUi( this );
 }
 
-QgsComposerLegendWidget::~QgsComposerLegendWidget()
-{
-
-}
-
 void QgsComposerLegendWidget::setGuiElements()
 {
   if ( !mLegend )
diff --git a/src/app/composer/qgscomposerlegendwidget.h b/src/app/composer/qgscomposerlegendwidget.h
index 7f2fc9eff5d..ebbaa843e91 100644
--- a/src/app/composer/qgscomposerlegendwidget.h
+++ b/src/app/composer/qgscomposerlegendwidget.h
@@ -35,7 +35,6 @@ class QgsComposerLegendWidget: public QgsComposerItemBaseWidget, private Ui::Qgs
 
   public:
     explicit QgsComposerLegendWidget( QgsComposerLegend *legend );
-    ~QgsComposerLegendWidget();
 
     //! Updates the legend layers and groups
     void updateLegend();
diff --git a/src/app/composer/qgscomposermapgridwidget.cpp b/src/app/composer/qgscomposermapgridwidget.cpp
index 0435dcf3bca..a45d01aac75 100644
--- a/src/app/composer/qgscomposermapgridwidget.cpp
+++ b/src/app/composer/qgscomposermapgridwidget.cpp
@@ -105,10 +105,6 @@ QgsComposerMapGridWidget::QgsComposerMapGridWidget( QgsComposerMapGrid *mapGrid,
   connect( mAnnotationFontButton, &QgsFontButton::changed, this, &QgsComposerMapGridWidget::annotationFontChanged );
 }
 
-QgsComposerMapGridWidget::~QgsComposerMapGridWidget()
-{
-}
-
 void QgsComposerMapGridWidget::populateDataDefinedButtons()
 {
   // none for now
diff --git a/src/app/composer/qgscomposermapgridwidget.h b/src/app/composer/qgscomposermapgridwidget.h
index 165b71cef37..63aa348284f 100644
--- a/src/app/composer/qgscomposermapgridwidget.h
+++ b/src/app/composer/qgscomposermapgridwidget.h
@@ -31,7 +31,6 @@ class QgsComposerMapGridWidget: public QgsComposerItemBaseWidget, private Ui::Qg
 
   public:
     explicit QgsComposerMapGridWidget( QgsComposerMapGrid *mapGrid, QgsComposerMap *composerMap );
-    virtual ~QgsComposerMapGridWidget();
 
   public slots:
 
diff --git a/src/app/composer/qgscomposermapwidget.cpp b/src/app/composer/qgscomposermapwidget.cpp
index 8e657ae6ef0..f2abc09c185 100644
--- a/src/app/composer/qgscomposermapwidget.cpp
+++ b/src/app/composer/qgscomposermapwidget.cpp
@@ -122,10 +122,6 @@ QgsComposerMapWidget::QgsComposerMapWidget( QgsComposerMap *composerMap )
   blockAllSignals( false );
 }
 
-QgsComposerMapWidget::~QgsComposerMapWidget()
-{
-}
-
 void QgsComposerMapWidget::populateDataDefinedButtons()
 {
   updateDataDefinedButton( mScaleDDBtn );
diff --git a/src/app/composer/qgscomposermapwidget.h b/src/app/composer/qgscomposermapwidget.h
index 176f6d492c0..d1ff0746c01 100644
--- a/src/app/composer/qgscomposermapwidget.h
+++ b/src/app/composer/qgscomposermapwidget.h
@@ -34,7 +34,6 @@ class QgsComposerMapWidget: public QgsComposerItemBaseWidget, private Ui::QgsCom
 
   public:
     explicit QgsComposerMapWidget( QgsComposerMap *composerMap );
-    virtual ~QgsComposerMapWidget();
 
   public slots:
     void on_mScaleLineEdit_editingFinished();
diff --git a/src/app/composer/qgscomposerpicturewidget.cpp b/src/app/composer/qgscomposerpicturewidget.cpp
index cad5a2c7a97..0f739317929 100644
--- a/src/app/composer/qgscomposerpicturewidget.cpp
+++ b/src/app/composer/qgscomposerpicturewidget.cpp
@@ -85,11 +85,6 @@ QgsComposerPictureWidget::QgsComposerPictureWidget( QgsComposerPicture *picture
   registerDataDefinedButton( mStrokeWidthDDBtn, QgsComposerObject::PictureSvgStrokeWidth );
 }
 
-QgsComposerPictureWidget::~QgsComposerPictureWidget()
-{
-
-}
-
 void QgsComposerPictureWidget::on_mPictureBrowseButton_clicked()
 {
   QgsSettings s;
diff --git a/src/app/composer/qgscomposerpicturewidget.h b/src/app/composer/qgscomposerpicturewidget.h
index d4fba1a19e8..dfffc5fb29d 100644
--- a/src/app/composer/qgscomposerpicturewidget.h
+++ b/src/app/composer/qgscomposerpicturewidget.h
@@ -32,7 +32,6 @@ class QgsComposerPictureWidget: public QgsComposerItemBaseWidget, private Ui::Qg
 
   public:
     explicit QgsComposerPictureWidget( QgsComposerPicture *picture );
-    ~QgsComposerPictureWidget();
 
     //! Add the icons of the standard directories to the preview
     void addStandardDirectoriesToPreview();
diff --git a/src/app/composer/qgscomposerpolygonwidget.cpp b/src/app/composer/qgscomposerpolygonwidget.cpp
index d1393eec2d4..c26d85b90d4 100644
--- a/src/app/composer/qgscomposerpolygonwidget.cpp
+++ b/src/app/composer/qgscomposerpolygonwidget.cpp
@@ -45,10 +45,6 @@ QgsComposerPolygonWidget::QgsComposerPolygonWidget( QgsComposerPolygon *composer
   }
 }
 
-QgsComposerPolygonWidget::~QgsComposerPolygonWidget()
-{
-}
-
 void QgsComposerPolygonWidget::on_mPolygonStyleButton_clicked()
 {
   if ( !mComposerPolygon )
diff --git a/src/app/composer/qgscomposerpolygonwidget.h b/src/app/composer/qgscomposerpolygonwidget.h
index 8991306055f..96032206b68 100644
--- a/src/app/composer/qgscomposerpolygonwidget.h
+++ b/src/app/composer/qgscomposerpolygonwidget.h
@@ -31,7 +31,6 @@ class QgsComposerPolygonWidget: public QgsComposerItemBaseWidget, private Ui::Qg
     Q_OBJECT
   public:
     explicit QgsComposerPolygonWidget( QgsComposerPolygon *composerPolygon );
-    ~QgsComposerPolygonWidget();
 
   private:
     QgsComposerPolygon *mComposerPolygon = nullptr;
diff --git a/src/app/composer/qgscomposerpolylinewidget.cpp b/src/app/composer/qgscomposerpolylinewidget.cpp
index 43f0f2bbf12..a511677b554 100644
--- a/src/app/composer/qgscomposerpolylinewidget.cpp
+++ b/src/app/composer/qgscomposerpolylinewidget.cpp
@@ -42,10 +42,6 @@ QgsComposerPolylineWidget::QgsComposerPolylineWidget( QgsComposerPolyline *compo
     connect( mComposerPolyline, &QgsComposerObject::itemChanged, this, &QgsComposerPolylineWidget::setGuiElementValues );
 }
 
-QgsComposerPolylineWidget::~QgsComposerPolylineWidget()
-{
-}
-
 void QgsComposerPolylineWidget::on_mLineStyleButton_clicked()
 {
   if ( !mComposerPolyline )
diff --git a/src/app/composer/qgscomposerpolylinewidget.h b/src/app/composer/qgscomposerpolylinewidget.h
index 5bec35baea1..ba0a4f7dc43 100644
--- a/src/app/composer/qgscomposerpolylinewidget.h
+++ b/src/app/composer/qgscomposerpolylinewidget.h
@@ -31,7 +31,6 @@ class QgsComposerPolylineWidget: public QgsComposerItemBaseWidget, private Ui::Q
     Q_OBJECT
   public:
     explicit QgsComposerPolylineWidget( QgsComposerPolyline *composerPolyline );
-    ~QgsComposerPolylineWidget();
 
   private:
     QgsComposerPolyline *mComposerPolyline = nullptr;
diff --git a/src/app/composer/qgscomposerscalebarwidget.cpp b/src/app/composer/qgscomposerscalebarwidget.cpp
index d10eda3731e..ae594315d1e 100644
--- a/src/app/composer/qgscomposerscalebarwidget.cpp
+++ b/src/app/composer/qgscomposerscalebarwidget.cpp
@@ -104,11 +104,6 @@ QgsComposerScaleBarWidget::QgsComposerScaleBarWidget( QgsComposerScaleBar *scale
   connect( mFontButton, &QgsFontButton::changed, this, &QgsComposerScaleBarWidget::fontChanged );
 }
 
-QgsComposerScaleBarWidget::~QgsComposerScaleBarWidget()
-{
-
-}
-
 void QgsComposerScaleBarWidget::setGuiElements()
 {
   if ( !mComposerScaleBar )
diff --git a/src/app/composer/qgscomposerscalebarwidget.h b/src/app/composer/qgscomposerscalebarwidget.h
index 7e59655be0c..b3f3586589d 100644
--- a/src/app/composer/qgscomposerscalebarwidget.h
+++ b/src/app/composer/qgscomposerscalebarwidget.h
@@ -31,7 +31,6 @@ class QgsComposerScaleBarWidget: public QgsComposerItemBaseWidget, private Ui::Q
 
   public:
     explicit QgsComposerScaleBarWidget( QgsComposerScaleBar *scaleBar );
-    ~QgsComposerScaleBarWidget();
 
   public slots:
 
diff --git a/src/app/composer/qgscomposershapewidget.cpp b/src/app/composer/qgscomposershapewidget.cpp
index ec928db0ef3..13e186d3f3a 100644
--- a/src/app/composer/qgscomposershapewidget.cpp
+++ b/src/app/composer/qgscomposershapewidget.cpp
@@ -60,11 +60,6 @@ QgsComposerShapeWidget::QgsComposerShapeWidget( QgsComposerShape *composerShape
   mShapeStyleButton->setLayer( atlasCoverageLayer() );
 }
 
-QgsComposerShapeWidget::~QgsComposerShapeWidget()
-{
-
-}
-
 void QgsComposerShapeWidget::blockAllSignals( bool block )
 {
   mShapeComboBox->blockSignals( block );
diff --git a/src/app/composer/qgscomposershapewidget.h b/src/app/composer/qgscomposershapewidget.h
index 21aaccefdd7..9429937c8ef 100644
--- a/src/app/composer/qgscomposershapewidget.h
+++ b/src/app/composer/qgscomposershapewidget.h
@@ -29,7 +29,6 @@ class QgsComposerShapeWidget: public QgsComposerItemBaseWidget, private Ui::QgsC
     Q_OBJECT
   public:
     explicit QgsComposerShapeWidget( QgsComposerShape *composerShape );
-    ~QgsComposerShapeWidget();
 
   private:
     QgsComposerShape *mComposerShape = nullptr;
diff --git a/src/app/composer/qgscompositionwidget.cpp b/src/app/composer/qgscompositionwidget.cpp
index c1f1d2b896f..55a3fb6c38d 100644
--- a/src/app/composer/qgscompositionwidget.cpp
+++ b/src/app/composer/qgscompositionwidget.cpp
@@ -130,11 +130,6 @@ QgsCompositionWidget::QgsCompositionWidget()
   setupUi( this );
 }
 
-QgsCompositionWidget::~QgsCompositionWidget()
-{
-
-}
-
 void QgsCompositionWidget::populateDataDefinedButtons()
 {
   if ( !mComposition )
diff --git a/src/app/composer/qgscompositionwidget.h b/src/app/composer/qgscompositionwidget.h
index c97088ca71b..ab918da6db5 100644
--- a/src/app/composer/qgscompositionwidget.h
+++ b/src/app/composer/qgscompositionwidget.h
@@ -39,7 +39,6 @@ class QgsCompositionWidget: public QgsPanelWidget, private Ui::QgsCompositionWid
     Q_OBJECT
   public:
     QgsCompositionWidget( QWidget *parent, QgsComposition *c );
-    ~QgsCompositionWidget();
 
   public slots:
     void on_mPaperSizeComboBox_currentIndexChanged( const QString &text );
diff --git a/src/app/pluginmanager/qgsapppluginmanagerinterface.cpp b/src/app/pluginmanager/qgsapppluginmanagerinterface.cpp
index a7c68601b08..9a6c6210979 100644
--- a/src/app/pluginmanager/qgsapppluginmanagerinterface.cpp
+++ b/src/app/pluginmanager/qgsapppluginmanagerinterface.cpp
@@ -24,11 +24,6 @@ QgsAppPluginManagerInterface::QgsAppPluginManagerInterface( QgsPluginManager *pl
 {
 }
 
-
-QgsAppPluginManagerInterface::~QgsAppPluginManagerInterface()
-{
-}
-
 void QgsAppPluginManagerInterface::showPluginManager( int tabIndex )
 {
   mPluginManager->getCppPluginsMetadata();
diff --git a/src/app/pluginmanager/qgsapppluginmanagerinterface.h b/src/app/pluginmanager/qgsapppluginmanagerinterface.h
index a4e64a7e1f3..f27b504f310 100644
--- a/src/app/pluginmanager/qgsapppluginmanagerinterface.h
+++ b/src/app/pluginmanager/qgsapppluginmanagerinterface.h
@@ -34,8 +34,6 @@ class QgsAppPluginManagerInterface : public QgsPluginManagerInterface
     //! Constructor
     explicit QgsAppPluginManagerInterface( QgsPluginManager *pluginManager );
 
-    ~QgsAppPluginManagerInterface();
-
     //! remove Python plugins from the metadata registry (c++ plugins stay)
     void clearPythonPluginMetadata() override;
 
diff --git a/src/app/qgisappstylesheet.cpp b/src/app/qgisappstylesheet.cpp
index 84ea4cd13dd..9e3aff71479 100644
--- a/src/app/qgisappstylesheet.cpp
+++ b/src/app/qgisappstylesheet.cpp
@@ -31,10 +31,6 @@ QgisAppStyleSheet::QgisAppStyleSheet( QObject *parent )
   setActiveValues();
 }
 
-QgisAppStyleSheet::~QgisAppStyleSheet()
-{
-}
-
 QMap<QString, QVariant> QgisAppStyleSheet::defaultOptions()
 {
   QMap<QString, QVariant> opts;
diff --git a/src/app/qgisappstylesheet.h b/src/app/qgisappstylesheet.h
index cb1dc23450a..8ef057df773 100644
--- a/src/app/qgisappstylesheet.h
+++ b/src/app/qgisappstylesheet.h
@@ -32,7 +32,6 @@ class APP_EXPORT QgisAppStyleSheet: public QObject
 
   public:
     QgisAppStyleSheet( QObject *parent = nullptr );
-    ~QgisAppStyleSheet();
 
     //! Return changeable options built from settings and/or defaults
     QMap<QString, QVariant> defaultOptions();
diff --git a/src/app/qgsabout.cpp b/src/app/qgsabout.cpp
index 23d0c080361..a263a1fd5e6 100644
--- a/src/app/qgsabout.cpp
+++ b/src/app/qgsabout.cpp
@@ -40,10 +40,6 @@ QgsAbout::QgsAbout( QWidget * parent )
   init();
 }
 
-QgsAbout::~QgsAbout()
-{
-}
-
 void QgsAbout::init()
 {
   setPluginInfo();
diff --git a/src/app/qgsabout.h b/src/app/qgsabout.h
index e020fb24282..0940d759147 100644
--- a/src/app/qgsabout.h
+++ b/src/app/qgsabout.h
@@ -26,7 +26,7 @@ class APP_EXPORT QgsAbout : public QgsOptionsDialogBase, private Ui::QgsAbout
     Q_OBJECT
   public:
     QgsAbout( QWidget *parent );
-    ~QgsAbout();
+
     void setVersion( const QString &v );
     static QString fileSystemSafe( const QString &string );
 
diff --git a/src/app/qgsaddtaborgroup.cpp b/src/app/qgsaddtaborgroup.cpp
index a1df918e4ca..3737caa2a37 100644
--- a/src/app/qgsaddtaborgroup.cpp
+++ b/src/app/qgsaddtaborgroup.cpp
@@ -56,10 +56,6 @@ QgsAddTabOrGroup::QgsAddTabOrGroup( QgsVectorLayer *lyr, const QList < TabPair >
   mColumnCountSpinBox->setValue( QgsSettings().value( QStringLiteral( "/qgis/attributeForm/defaultTabColumnCount" ), 1 ).toInt() );
 
   setWindowTitle( tr( "Add Tab or Group for %1" ).arg( mLayer->name() ) );
-} // QgsVectorLayerProperties ctor
-
-QgsAddTabOrGroup::~QgsAddTabOrGroup()
-{
 }
 
 QString QgsAddTabOrGroup::name()
diff --git a/src/app/qgsaddtaborgroup.h b/src/app/qgsaddtaborgroup.h
index 7f955def035..ea9f5bf716f 100644
--- a/src/app/qgsaddtaborgroup.h
+++ b/src/app/qgsaddtaborgroup.h
@@ -36,7 +36,6 @@ class APP_EXPORT QgsAddTabOrGroup : public QDialog, private Ui::QgsAddTabOrGroup
 
   public:
     QgsAddTabOrGroup( QgsVectorLayer *lyr, const QList<TabPair> &tabList, QWidget *parent = nullptr );
-    ~QgsAddTabOrGroup();
 
     QString name();
 
diff --git a/src/app/qgsannotationwidget.cpp b/src/app/qgsannotationwidget.cpp
index 6b4a32901a7..e568449f5a9 100644
--- a/src/app/qgsannotationwidget.cpp
+++ b/src/app/qgsannotationwidget.cpp
@@ -74,10 +74,6 @@ QgsAnnotationWidget::QgsAnnotationWidget( QgsMapCanvasAnnotationItem *item, QWid
   mFrameStyleButton->setMapCanvas( QgisApp::instance()->mapCanvas() );
 }
 
-QgsAnnotationWidget::~QgsAnnotationWidget()
-{
-}
-
 void QgsAnnotationWidget::apply()
 {
   if ( mItem )
diff --git a/src/app/qgsannotationwidget.h b/src/app/qgsannotationwidget.h
index 2e499165ce3..76b9d67367a 100644
--- a/src/app/qgsannotationwidget.h
+++ b/src/app/qgsannotationwidget.h
@@ -33,7 +33,6 @@ class APP_EXPORT QgsAnnotationWidget: public QWidget, private Ui::QgsAnnotationW
     Q_OBJECT
   public:
     QgsAnnotationWidget( QgsMapCanvasAnnotationItem *item, QWidget *parent = nullptr, Qt::WindowFlags f = 0 );
-    ~QgsAnnotationWidget();
 
     void apply();
 
diff --git a/src/app/qgsclipboard.cpp b/src/app/qgsclipboard.cpp
index 7fb7aa9f0f9..fb29a2b858c 100644
--- a/src/app/qgsclipboard.cpp
+++ b/src/app/qgsclipboard.cpp
@@ -48,10 +48,6 @@ QgsClipboard::QgsClipboard()
   connect( QApplication::clipboard(), &QClipboard::dataChanged, this, &QgsClipboard::systemClipboardChanged );
 }
 
-QgsClipboard::~QgsClipboard()
-{
-}
-
 void QgsClipboard::replaceWithCopyOf( QgsVectorLayer *src )
 {
   if ( !src )
diff --git a/src/app/qgsclipboard.h b/src/app/qgsclipboard.h
index 7237aa6cbd7..3edcabfc437 100644
--- a/src/app/qgsclipboard.h
+++ b/src/app/qgsclipboard.h
@@ -69,8 +69,6 @@ class APP_EXPORT QgsClipboard : public QObject
      */
     QgsClipboard();
 
-    virtual ~QgsClipboard();
-
     /**
      *  Place a copy of the selected features from the specified layer on
      *  the internal clipboard, destroying the previous contents.
diff --git a/src/app/qgscustomization.cpp b/src/app/qgscustomization.cpp
index 89b0f843b10..e196e5453e2 100644
--- a/src/app/qgscustomization.cpp
+++ b/src/app/qgscustomization.cpp
@@ -644,10 +644,6 @@ QgsCustomization::QgsCustomization()
   mEnabled = settings.value( QStringLiteral( "UI/Customization/enabled" ), "false" ).toString() == QLatin1String( "true" );
 }
 
-QgsCustomization::~QgsCustomization()
-{
-}
-
 void QgsCustomization::updateMainWindow( QMenu *toolBarMenu )
 {
   // collect tree items even if the customization is disabled
diff --git a/src/app/qgscustomization.h b/src/app/qgscustomization.h
index 1846779f8b6..ab2827c0802 100644
--- a/src/app/qgscustomization.h
+++ b/src/app/qgscustomization.h
@@ -148,7 +148,7 @@ class APP_EXPORT QgsCustomization : public QObject
 
   protected:
     QgsCustomization();
-    ~QgsCustomization();
+    ~QgsCustomization() = default;
     QgsCustomizationDialog *pDialog = nullptr;
 
     bool mEnabled;
diff --git a/src/app/qgsdecorationitem.cpp b/src/app/qgsdecorationitem.cpp
index d25145e54b4..63770efb1cb 100644
--- a/src/app/qgsdecorationitem.cpp
+++ b/src/app/qgsdecorationitem.cpp
@@ -52,11 +52,6 @@ QgsDecorationItem::QgsDecorationItem( QObject *parent )
 {
 }
 
-QgsDecorationItem::~QgsDecorationItem()
-{
-
-}
-
 void QgsDecorationItem::update()
 {
   saveToProject();
diff --git a/src/app/qgsdecorationitem.h b/src/app/qgsdecorationitem.h
index 2e716947af4..e9e368ccff3 100644
--- a/src/app/qgsdecorationitem.h
+++ b/src/app/qgsdecorationitem.h
@@ -46,8 +46,6 @@ class APP_EXPORT QgsDecorationItem : public QObject, public QgsMapDecoration
     //! Constructor
     QgsDecorationItem( QObject *parent = nullptr );
 
-    virtual ~ QgsDecorationItem();
-
     void setEnabled( bool enabled ) { mEnabled = enabled; }
     bool enabled() const { return mEnabled; }
 
diff --git a/src/app/qgsdecorationnortharrow.cpp b/src/app/qgsdecorationnortharrow.cpp
index 642010bab2a..34e20667ec7 100644
--- a/src/app/qgsdecorationnortharrow.cpp
+++ b/src/app/qgsdecorationnortharrow.cpp
@@ -69,10 +69,6 @@ QgsDecorationNorthArrow::QgsDecorationNorthArrow( QObject *parent )
   projectRead();
 }
 
-QgsDecorationNorthArrow::~QgsDecorationNorthArrow()
-{
-}
-
 void QgsDecorationNorthArrow::projectRead()
 {
   QgsDecorationItem::projectRead();
diff --git a/src/app/qgsdecorationnortharrow.h b/src/app/qgsdecorationnortharrow.h
index c5f655ff0c2..fa5ab477239 100644
--- a/src/app/qgsdecorationnortharrow.h
+++ b/src/app/qgsdecorationnortharrow.h
@@ -36,8 +36,6 @@ class APP_EXPORT QgsDecorationNorthArrow: public QgsDecorationItem
     //! Constructor
     QgsDecorationNorthArrow( QObject *parent = nullptr );
 
-    virtual ~QgsDecorationNorthArrow();
-
   public slots:
     //! set values on the gui when a project is read or the gui first loaded
     void projectRead() override;
diff --git a/src/app/qgsdecorationscalebar.cpp b/src/app/qgsdecorationscalebar.cpp
index a0b65f5d546..254750be725 100644
--- a/src/app/qgsdecorationscalebar.cpp
+++ b/src/app/qgsdecorationscalebar.cpp
@@ -65,11 +65,6 @@ QgsDecorationScaleBar::QgsDecorationScaleBar( QObject *parent )
   projectRead();
 }
 
-QgsDecorationScaleBar::~QgsDecorationScaleBar()
-{
-
-}
-
 void QgsDecorationScaleBar::projectRead()
 {
   QgsDecorationItem::projectRead();
diff --git a/src/app/qgsdecorationscalebar.h b/src/app/qgsdecorationscalebar.h
index c2d7baad0a4..467a331b0c5 100644
--- a/src/app/qgsdecorationscalebar.h
+++ b/src/app/qgsdecorationscalebar.h
@@ -36,8 +36,6 @@ class APP_EXPORT QgsDecorationScaleBar: public QgsDecorationItem
     //! Constructor
     QgsDecorationScaleBar( QObject *parent = nullptr );
 
-    virtual ~ QgsDecorationScaleBar();
-
   public slots:
     //! set values on the gui when a project is read or the gui first loaded
     void projectRead() override;
diff --git a/src/app/qgsdisplayangle.cpp b/src/app/qgsdisplayangle.cpp
index 5b6783531fe..52c41215f20 100644
--- a/src/app/qgsdisplayangle.cpp
+++ b/src/app/qgsdisplayangle.cpp
@@ -30,10 +30,6 @@ QgsDisplayAngle::QgsDisplayAngle( QgsMapToolMeasureAngle *tool, Qt::WindowFlags
   setupUi( this );
 }
 
-QgsDisplayAngle::~QgsDisplayAngle()
-{
-}
-
 void QgsDisplayAngle::setValueInRadians( double value )
 {
   mValue = value;
diff --git a/src/app/qgsdisplayangle.h b/src/app/qgsdisplayangle.h
index 0317ba6b772..de1069e42c9 100644
--- a/src/app/qgsdisplayangle.h
+++ b/src/app/qgsdisplayangle.h
@@ -28,7 +28,6 @@ class APP_EXPORT QgsDisplayAngle: public QDialog, private Ui::QgsDisplayAngleBas
 
   public:
     QgsDisplayAngle( QgsMapToolMeasureAngle *tool = nullptr, Qt::WindowFlags f = 0 );
-    ~QgsDisplayAngle();
 
     /** Sets the measured angle value (in radians). The value is going to
       be converted to degrees / gon automatically if necessary*/
diff --git a/src/app/qgsdxfexportdialog.cpp b/src/app/qgsdxfexportdialog.cpp
index 350375b38de..58c9482adda 100644
--- a/src/app/qgsdxfexportdialog.cpp
+++ b/src/app/qgsdxfexportdialog.cpp
@@ -99,10 +99,6 @@ QgsVectorLayerAndAttributeModel::QgsVectorLayerAndAttributeModel( QgsLayerTree *
 {
 }
 
-QgsVectorLayerAndAttributeModel::~QgsVectorLayerAndAttributeModel()
-{
-}
-
 int QgsVectorLayerAndAttributeModel::columnCount( const QModelIndex &parent ) const
 {
   Q_UNUSED( parent );
diff --git a/src/app/qgsdxfexportdialog.h b/src/app/qgsdxfexportdialog.h
index c3ea3fce305..9923b0372cc 100644
--- a/src/app/qgsdxfexportdialog.h
+++ b/src/app/qgsdxfexportdialog.h
@@ -47,7 +47,6 @@ class QgsVectorLayerAndAttributeModel : public QgsLayerTreeModel
     Q_OBJECT
   public:
     QgsVectorLayerAndAttributeModel( QgsLayerTree *rootNode, QObject *parent = nullptr );
-    ~QgsVectorLayerAndAttributeModel();
 
     int columnCount( const QModelIndex &parent = QModelIndex() ) const override;
     QVariant headerData( int section, Qt::Orientation orientation, int role = Qt::DisplayRole ) const override;
diff --git a/src/app/qgsformannotationdialog.cpp b/src/app/qgsformannotationdialog.cpp
index 142416087ac..7cc9a63963c 100644
--- a/src/app/qgsformannotationdialog.cpp
+++ b/src/app/qgsformannotationdialog.cpp
@@ -46,11 +46,6 @@ QgsFormAnnotationDialog::QgsFormAnnotationDialog( QgsMapCanvasAnnotationItem *it
   mButtonBox->addButton( deleteButton, QDialogButtonBox::RejectRole );
 }
 
-QgsFormAnnotationDialog::~QgsFormAnnotationDialog()
-{
-
-}
-
 void QgsFormAnnotationDialog::applySettingsToItem()
 {
   //apply settings from embedded item widget
diff --git a/src/app/qgsformannotationdialog.h b/src/app/qgsformannotationdialog.h
index 1164643f4eb..55d89f76080 100644
--- a/src/app/qgsformannotationdialog.h
+++ b/src/app/qgsformannotationdialog.h
@@ -26,7 +26,6 @@ class APP_EXPORT QgsFormAnnotationDialog: public QDialog, private Ui::QgsFormAnn
     Q_OBJECT
   public:
     QgsFormAnnotationDialog( QgsMapCanvasAnnotationItem *item, QWidget *parent = nullptr, Qt::WindowFlags f = 0 );
-    ~QgsFormAnnotationDialog();
 
   private:
     QgsMapCanvasAnnotationItem *mItem = nullptr;
diff --git a/src/app/qgshandlebadlayers.cpp b/src/app/qgshandlebadlayers.cpp
index 3856718da93..86e1426d96f 100644
--- a/src/app/qgshandlebadlayers.cpp
+++ b/src/app/qgshandlebadlayers.cpp
@@ -34,10 +34,6 @@
 #include <QMessageBox>
 #include <QUrl>
 
-QgsHandleBadLayersHandler::QgsHandleBadLayersHandler()
-{
-}
-
 void QgsHandleBadLayersHandler::handleBadLayers( const QList<QDomNode> &layers )
 {
   QApplication::setOverrideCursor( Qt::ArrowCursor );
@@ -151,10 +147,6 @@ QgsHandleBadLayers::QgsHandleBadLayers( const QList<QDomNode> &layers )
   // mLayerList->resizeColumnsToContents();
 }
 
-QgsHandleBadLayers::~QgsHandleBadLayers()
-{
-}
-
 void QgsHandleBadLayers::selectionChanged()
 {
 
diff --git a/src/app/qgshandlebadlayers.h b/src/app/qgshandlebadlayers.h
index 9c3a61c3a6c..988dee46f9c 100644
--- a/src/app/qgshandlebadlayers.h
+++ b/src/app/qgshandlebadlayers.h
@@ -29,7 +29,7 @@ class APP_EXPORT QgsHandleBadLayersHandler
     Q_OBJECT
 
   public:
-    QgsHandleBadLayersHandler();
+    QgsHandleBadLayersHandler() = default;
 
     //! Implementation of the handler
     virtual void handleBadLayers( const QList<QDomNode> &layers ) override;
@@ -46,7 +46,6 @@ class APP_EXPORT QgsHandleBadLayers
 
   public:
     QgsHandleBadLayers( const QList<QDomNode> &layers );
-    ~QgsHandleBadLayers();
 
     int layerCount();
 
diff --git a/src/app/qgshtmlannotationdialog.cpp b/src/app/qgshtmlannotationdialog.cpp
index 1f81c7b6ff2..a06268d5f88 100644
--- a/src/app/qgshtmlannotationdialog.cpp
+++ b/src/app/qgshtmlannotationdialog.cpp
@@ -47,11 +47,6 @@ QgsHtmlAnnotationDialog::QgsHtmlAnnotationDialog( QgsMapCanvasAnnotationItem *it
   mButtonBox->addButton( deleteButton, QDialogButtonBox::RejectRole );
 }
 
-QgsHtmlAnnotationDialog::~QgsHtmlAnnotationDialog()
-{
-
-}
-
 void QgsHtmlAnnotationDialog::applySettingsToItem()
 {
   //apply settings from embedded item widget
diff --git a/src/app/qgshtmlannotationdialog.h b/src/app/qgshtmlannotationdialog.h
index ad43898bf66..b64a4ea2faa 100644
--- a/src/app/qgshtmlannotationdialog.h
+++ b/src/app/qgshtmlannotationdialog.h
@@ -26,7 +26,6 @@ class APP_EXPORT QgsHtmlAnnotationDialog: public QDialog, private Ui::QgsFormAnn
     Q_OBJECT
   public:
     QgsHtmlAnnotationDialog( QgsMapCanvasAnnotationItem *item, QWidget *parent = nullptr, Qt::WindowFlags f = 0 );
-    ~QgsHtmlAnnotationDialog();
 
   private:
     QgsMapCanvasAnnotationItem *mItem = nullptr;
diff --git a/src/app/qgsjoindialog.cpp b/src/app/qgsjoindialog.cpp
index 7633b3093ef..f7ebf9f9c5e 100644
--- a/src/app/qgsjoindialog.cpp
+++ b/src/app/qgsjoindialog.cpp
@@ -69,10 +69,6 @@ QgsJoinDialog::QgsJoinDialog( QgsVectorLayer *layer, QList<QgsMapLayer *> alread
   checkDefinitionValid();
 }
 
-QgsJoinDialog::~QgsJoinDialog()
-{
-}
-
 void QgsJoinDialog::setJoinInfo( const QgsVectorLayerJoinInfo &joinInfo )
 {
   mJoinLayerComboBox->setLayer( joinInfo.joinLayer() );
diff --git a/src/app/qgsjoindialog.h b/src/app/qgsjoindialog.h
index 97abdd0f7c3..4508631187b 100644
--- a/src/app/qgsjoindialog.h
+++ b/src/app/qgsjoindialog.h
@@ -29,7 +29,6 @@ class APP_EXPORT QgsJoinDialog: public QDialog, private Ui::QgsJoinDialogBase
     Q_OBJECT
   public:
     QgsJoinDialog( QgsVectorLayer *layer, QList<QgsMapLayer *> alreadyJoinedLayers, QWidget *parent = nullptr, Qt::WindowFlags f = 0 );
-    ~QgsJoinDialog();
 
     //! Configure the dialog for an existing join
     void setJoinInfo( const QgsVectorLayerJoinInfo &joinInfo );
diff --git a/src/app/qgsmaptooladdfeature.cpp b/src/app/qgsmaptooladdfeature.cpp
index a0d5bd0fe1d..848009441c1 100644
--- a/src/app/qgsmaptooladdfeature.cpp
+++ b/src/app/qgsmaptooladdfeature.cpp
@@ -45,10 +45,6 @@ QgsMapToolAddFeature::QgsMapToolAddFeature( QgsMapCanvas *canvas, CaptureMode mo
   connect( QgisApp::instance(), &QgisApp::projectRead, this, &QgsMapToolAddFeature::stopCapturing );
 }
 
-QgsMapToolAddFeature::~QgsMapToolAddFeature()
-{
-}
-
 bool QgsMapToolAddFeature::addFeature( QgsVectorLayer *vlayer, QgsFeature *f, bool showModal )
 {
   QgsExpressionContextScope *scope = QgsExpressionContextUtils::mapToolCaptureScope( snappingMatches() );
diff --git a/src/app/qgsmaptooladdfeature.h b/src/app/qgsmaptooladdfeature.h
index dec83cd2b9e..fff4a79af24 100644
--- a/src/app/qgsmaptooladdfeature.h
+++ b/src/app/qgsmaptooladdfeature.h
@@ -23,7 +23,7 @@ class APP_EXPORT QgsMapToolAddFeature : public QgsMapToolCapture
   public:
     //! \since QGIS 2.12
     QgsMapToolAddFeature( QgsMapCanvas *canvas, CaptureMode mode );
-    virtual ~QgsMapToolAddFeature();
+
     void cadCanvasReleaseEvent( QgsMapMouseEvent *e ) override;
 
     bool addFeature( QgsVectorLayer *vlayer, QgsFeature *f, bool showModal = true );
diff --git a/src/app/qgsmaptooladdpart.cpp b/src/app/qgsmaptooladdpart.cpp
index 6ed526c1767..9fe9b30c0b6 100644
--- a/src/app/qgsmaptooladdpart.cpp
+++ b/src/app/qgsmaptooladdpart.cpp
@@ -35,10 +35,6 @@ QgsMapToolAddPart::QgsMapToolAddPart( QgsMapCanvas *canvas )
   connect( QgisApp::instance(), &QgisApp::projectRead, this, &QgsMapToolAddPart::stopCapturing );
 }
 
-QgsMapToolAddPart::~QgsMapToolAddPart()
-{
-}
-
 void QgsMapToolAddPart::canvasReleaseEvent( QgsMapMouseEvent *e )
 {
   if ( checkSelection() )
diff --git a/src/app/qgsmaptooladdpart.h b/src/app/qgsmaptooladdpart.h
index 5f8ce14b7f5..8e82d7c5f4c 100644
--- a/src/app/qgsmaptooladdpart.h
+++ b/src/app/qgsmaptooladdpart.h
@@ -22,7 +22,7 @@ class APP_EXPORT QgsMapToolAddPart : public QgsMapToolCapture
     Q_OBJECT
   public:
     QgsMapToolAddPart( QgsMapCanvas *canvas );
-    virtual ~QgsMapToolAddPart();
+
     void canvasReleaseEvent( QgsMapMouseEvent *e ) override;
     void cadCanvasReleaseEvent( QgsMapMouseEvent *e ) override;
 
diff --git a/src/app/qgsmaptooladdring.cpp b/src/app/qgsmaptooladdring.cpp
index 99f44dffd0c..aca5e2a489a 100644
--- a/src/app/qgsmaptooladdring.cpp
+++ b/src/app/qgsmaptooladdring.cpp
@@ -33,10 +33,6 @@ QgsMapToolAddRing::QgsMapToolAddRing( QgsMapCanvas *canvas )
   connect( QgisApp::instance(), &QgisApp::projectRead, this, &QgsMapToolAddRing::stopCapturing );
 }
 
-QgsMapToolAddRing::~QgsMapToolAddRing()
-{
-}
-
 void QgsMapToolAddRing::cadCanvasReleaseEvent( QgsMapMouseEvent *e )
 {
 
diff --git a/src/app/qgsmaptooladdring.h b/src/app/qgsmaptooladdring.h
index a78c9240dc3..172d5bea600 100644
--- a/src/app/qgsmaptooladdring.h
+++ b/src/app/qgsmaptooladdring.h
@@ -22,6 +22,5 @@ class APP_EXPORT QgsMapToolAddRing: public QgsMapToolCapture
     Q_OBJECT
   public:
     QgsMapToolAddRing( QgsMapCanvas *canvas );
-    virtual ~QgsMapToolAddRing();
     void cadCanvasReleaseEvent( QgsMapMouseEvent *e ) override;
 };
diff --git a/src/app/qgsmaptoolannotation.cpp b/src/app/qgsmaptoolannotation.cpp
index e358c28efbc..bdfc0065775 100644
--- a/src/app/qgsmaptoolannotation.cpp
+++ b/src/app/qgsmaptoolannotation.cpp
@@ -39,10 +39,6 @@ QgsMapToolAnnotation::QgsMapToolAnnotation( QgsMapCanvas *canvas )
   mCursor = QCursor( Qt::ArrowCursor );
 }
 
-QgsMapToolAnnotation::~QgsMapToolAnnotation()
-{
-}
-
 QDialog *QgsMapToolAnnotation::createItemEditor( QgsMapCanvasAnnotationItem *item )
 {
   if ( !item || !item->annotation() )
diff --git a/src/app/qgsmaptoolannotation.h b/src/app/qgsmaptoolannotation.h
index 79e6fd0ff0d..3e862ce26eb 100644
--- a/src/app/qgsmaptoolannotation.h
+++ b/src/app/qgsmaptoolannotation.h
@@ -30,7 +30,6 @@ class APP_EXPORT QgsMapToolAnnotation: public QgsMapTool
 
   public:
     QgsMapToolAnnotation( QgsMapCanvas *canvas );
-    ~QgsMapToolAnnotation();
 
     void canvasPressEvent( QgsMapMouseEvent *e ) override;
     void canvasReleaseEvent( QgsMapMouseEvent *e ) override;
diff --git a/src/app/qgsmaptoolchangelabelproperties.cpp b/src/app/qgsmaptoolchangelabelproperties.cpp
index 938808b05d6..60eeb2e16fc 100644
--- a/src/app/qgsmaptoolchangelabelproperties.cpp
+++ b/src/app/qgsmaptoolchangelabelproperties.cpp
@@ -25,10 +25,6 @@ QgsMapToolChangeLabelProperties::QgsMapToolChangeLabelProperties( QgsMapCanvas *
 {
 }
 
-QgsMapToolChangeLabelProperties::~QgsMapToolChangeLabelProperties()
-{
-}
-
 void QgsMapToolChangeLabelProperties::canvasPressEvent( QgsMapMouseEvent *e )
 {
   deleteRubberBands();
diff --git a/src/app/qgsmaptoolchangelabelproperties.h b/src/app/qgsmaptoolchangelabelproperties.h
index 38b271c4651..09eba08ec75 100644
--- a/src/app/qgsmaptoolchangelabelproperties.h
+++ b/src/app/qgsmaptoolchangelabelproperties.h
@@ -27,7 +27,6 @@ class APP_EXPORT QgsMapToolChangeLabelProperties: public QgsMapToolLabel
 
   public:
     QgsMapToolChangeLabelProperties( QgsMapCanvas *canvas );
-    ~QgsMapToolChangeLabelProperties();
 
     virtual void canvasPressEvent( QgsMapMouseEvent *e ) override;
     virtual void canvasReleaseEvent( QgsMapMouseEvent *e ) override;
diff --git a/src/app/qgsmaptoolcircularstringcurvepoint.cpp b/src/app/qgsmaptoolcircularstringcurvepoint.cpp
index ba1124bde8a..725ae798771 100644
--- a/src/app/qgsmaptoolcircularstringcurvepoint.cpp
+++ b/src/app/qgsmaptoolcircularstringcurvepoint.cpp
@@ -27,10 +27,6 @@ QgsMapToolCircularStringCurvePoint::QgsMapToolCircularStringCurvePoint( QgsMapTo
 
 }
 
-QgsMapToolCircularStringCurvePoint::~QgsMapToolCircularStringCurvePoint()
-{
-}
-
 void QgsMapToolCircularStringCurvePoint::cadCanvasReleaseEvent( QgsMapMouseEvent *e )
 {
   QgsPoint mapPoint( e->mapPoint() );
diff --git a/src/app/qgsmaptoolcircularstringcurvepoint.h b/src/app/qgsmaptoolcircularstringcurvepoint.h
index a734dcb4048..bf4accaa099 100644
--- a/src/app/qgsmaptoolcircularstringcurvepoint.h
+++ b/src/app/qgsmaptoolcircularstringcurvepoint.h
@@ -25,7 +25,6 @@ class QgsMapToolCircularStringCurvePoint: public QgsMapToolAddCircularString
 
   public:
     QgsMapToolCircularStringCurvePoint( QgsMapToolCapture *parentTool, QgsMapCanvas *canvas, CaptureMode mode = CaptureLine );
-    ~QgsMapToolCircularStringCurvePoint();
 
     void cadCanvasReleaseEvent( QgsMapMouseEvent *e ) override;
     void cadCanvasMoveEvent( QgsMapMouseEvent *e ) override;
diff --git a/src/app/qgsmaptoolcircularstringradius.cpp b/src/app/qgsmaptoolcircularstringradius.cpp
index ed7412070c0..39850c17058 100644
--- a/src/app/qgsmaptoolcircularstringradius.cpp
+++ b/src/app/qgsmaptoolcircularstringradius.cpp
@@ -35,11 +35,6 @@ QgsMapToolCircularStringRadius::QgsMapToolCircularStringRadius( QgsMapToolCaptur
 
 }
 
-QgsMapToolCircularStringRadius::~QgsMapToolCircularStringRadius()
-{
-
-}
-
 void QgsMapToolCircularStringRadius::deactivate()
 {
   deleteRadiusSpinBox();
diff --git a/src/app/qgsmaptoolcircularstringradius.h b/src/app/qgsmaptoolcircularstringradius.h
index aa3fb0462f8..ea02ea08bea 100644
--- a/src/app/qgsmaptoolcircularstringradius.h
+++ b/src/app/qgsmaptoolcircularstringradius.h
@@ -27,7 +27,6 @@ class QgsMapToolCircularStringRadius: public QgsMapToolAddCircularString
     Q_OBJECT
   public:
     QgsMapToolCircularStringRadius( QgsMapToolCapture *parentTool, QgsMapCanvas *canvas, CaptureMode mode = CaptureLine );
-    ~QgsMapToolCircularStringRadius();
 
     virtual void cadCanvasReleaseEvent( QgsMapMouseEvent *e ) override;
     virtual void cadCanvasMoveEvent( QgsMapMouseEvent *e ) override;
diff --git a/src/app/qgsmaptoolfeatureaction.cpp b/src/app/qgsmaptoolfeatureaction.cpp
index 4aabf44698b..a63e1804594 100644
--- a/src/app/qgsmaptoolfeatureaction.cpp
+++ b/src/app/qgsmaptoolfeatureaction.cpp
@@ -43,10 +43,6 @@ QgsMapToolFeatureAction::QgsMapToolFeatureAction( QgsMapCanvas *canvas )
 {
 }
 
-QgsMapToolFeatureAction::~QgsMapToolFeatureAction()
-{
-}
-
 void QgsMapToolFeatureAction::canvasMoveEvent( QgsMapMouseEvent *e )
 {
   Q_UNUSED( e );
diff --git a/src/app/qgsmaptoolfeatureaction.h b/src/app/qgsmaptoolfeatureaction.h
index f75ff949da1..f804834eff8 100644
--- a/src/app/qgsmaptoolfeatureaction.h
+++ b/src/app/qgsmaptoolfeatureaction.h
@@ -35,8 +35,6 @@ class APP_EXPORT QgsMapToolFeatureAction : public QgsMapTool
   public:
     QgsMapToolFeatureAction( QgsMapCanvas *canvas );
 
-    ~QgsMapToolFeatureAction();
-
     virtual Flags flags() const override { return QgsMapTool::AllowZoomRect; }
 
     //! Overridden mouse move event
diff --git a/src/app/qgsmaptoolfillring.cpp b/src/app/qgsmaptoolfillring.cpp
index ce4825efbc6..5a298b06101 100644
--- a/src/app/qgsmaptoolfillring.cpp
+++ b/src/app/qgsmaptoolfillring.cpp
@@ -31,10 +31,6 @@ QgsMapToolFillRing::QgsMapToolFillRing( QgsMapCanvas *canvas )
 {
 }
 
-QgsMapToolFillRing::~QgsMapToolFillRing()
-{
-}
-
 void QgsMapToolFillRing::cadCanvasReleaseEvent( QgsMapMouseEvent *e )
 {
   //check if we operate on a vector layer
diff --git a/src/app/qgsmaptoolfillring.h b/src/app/qgsmaptoolfillring.h
index a4cc066ab79..0729a7f6909 100644
--- a/src/app/qgsmaptoolfillring.h
+++ b/src/app/qgsmaptoolfillring.h
@@ -25,7 +25,6 @@ class APP_EXPORT QgsMapToolFillRing: public QgsMapToolCapture
     Q_OBJECT
   public:
     QgsMapToolFillRing( QgsMapCanvas *canvas );
-    virtual ~QgsMapToolFillRing();
     void cadCanvasReleaseEvent( QgsMapMouseEvent *e ) override;
 
   private:
diff --git a/src/app/qgsmaptoolformannotation.cpp b/src/app/qgsmaptoolformannotation.cpp
index 66fb4d8c464..7b173965ca4 100644
--- a/src/app/qgsmaptoolformannotation.cpp
+++ b/src/app/qgsmaptoolformannotation.cpp
@@ -27,11 +27,6 @@ QgsMapToolFormAnnotation::QgsMapToolFormAnnotation( QgsMapCanvas *canvas ): QgsM
 
 }
 
-QgsMapToolFormAnnotation::~QgsMapToolFormAnnotation()
-{
-
-}
-
 QgsAnnotation *QgsMapToolFormAnnotation::createItem() const
 {
   return new QgsFormAnnotation();
diff --git a/src/app/qgsmaptoolformannotation.h b/src/app/qgsmaptoolformannotation.h
index 48dfcb836c9..039843dec57 100644
--- a/src/app/qgsmaptoolformannotation.h
+++ b/src/app/qgsmaptoolformannotation.h
@@ -27,7 +27,6 @@ class APP_EXPORT QgsMapToolFormAnnotation: public QgsMapToolAnnotation
 
   public:
     QgsMapToolFormAnnotation( QgsMapCanvas *canvas );
-    ~QgsMapToolFormAnnotation();
 
   protected:
     QgsAnnotation *createItem() const override;
diff --git a/src/app/qgsmaptoolhtmlannotation.cpp b/src/app/qgsmaptoolhtmlannotation.cpp
index ac95f26bfa9..567003eb700 100644
--- a/src/app/qgsmaptoolhtmlannotation.cpp
+++ b/src/app/qgsmaptoolhtmlannotation.cpp
@@ -27,11 +27,6 @@ QgsMapToolHtmlAnnotation::QgsMapToolHtmlAnnotation( QgsMapCanvas *canvas ): QgsM
 
 }
 
-QgsMapToolHtmlAnnotation::~QgsMapToolHtmlAnnotation()
-{
-
-}
-
 QgsAnnotation *QgsMapToolHtmlAnnotation::createItem() const
 {
   return new QgsHtmlAnnotation();
diff --git a/src/app/qgsmaptoolhtmlannotation.h b/src/app/qgsmaptoolhtmlannotation.h
index 3369cd38fdd..4c3ae209cc9 100644
--- a/src/app/qgsmaptoolhtmlannotation.h
+++ b/src/app/qgsmaptoolhtmlannotation.h
@@ -27,7 +27,6 @@ class APP_EXPORT QgsMapToolHtmlAnnotation: public QgsMapToolAnnotation
 
   public:
     QgsMapToolHtmlAnnotation( QgsMapCanvas *canvas );
-    ~QgsMapToolHtmlAnnotation();
 
   protected:
     QgsAnnotation *createItem() const override;
diff --git a/src/app/qgsmaptoolmovelabel.cpp b/src/app/qgsmaptoolmovelabel.cpp
index 3e571bd456e..95af8dfa04c 100644
--- a/src/app/qgsmaptoolmovelabel.cpp
+++ b/src/app/qgsmaptoolmovelabel.cpp
@@ -29,10 +29,6 @@ QgsMapToolMoveLabel::QgsMapToolMoveLabel( QgsMapCanvas *canvas )
   mToolName = tr( "Move label" );
 }
 
-QgsMapToolMoveLabel::~QgsMapToolMoveLabel()
-{
-}
-
 void QgsMapToolMoveLabel::canvasPressEvent( QgsMapMouseEvent *e )
 {
   deleteRubberBands();
diff --git a/src/app/qgsmaptoolmovelabel.h b/src/app/qgsmaptoolmovelabel.h
index abbea8506f1..97c0883034c 100644
--- a/src/app/qgsmaptoolmovelabel.h
+++ b/src/app/qgsmaptoolmovelabel.h
@@ -28,7 +28,6 @@ class APP_EXPORT QgsMapToolMoveLabel: public QgsMapToolLabel
 
   public:
     QgsMapToolMoveLabel( QgsMapCanvas *canvas );
-    ~QgsMapToolMoveLabel();
 
     virtual void canvasPressEvent( QgsMapMouseEvent *e ) override;
 
diff --git a/src/app/qgsmaptoolreshape.cpp b/src/app/qgsmaptoolreshape.cpp
index 392e651edeb..d0ee9730146 100644
--- a/src/app/qgsmaptoolreshape.cpp
+++ b/src/app/qgsmaptoolreshape.cpp
@@ -29,10 +29,6 @@ QgsMapToolReshape::QgsMapToolReshape( QgsMapCanvas *canvas )
 {
 }
 
-QgsMapToolReshape::~QgsMapToolReshape()
-{
-}
-
 void QgsMapToolReshape::cadCanvasReleaseEvent( QgsMapMouseEvent *e )
 {
   //check if we operate on a vector layer //todo: move this to a function in parent class to avoid duplication
diff --git a/src/app/qgsmaptoolreshape.h b/src/app/qgsmaptoolreshape.h
index 54a18d0f4d9..875a97828aa 100644
--- a/src/app/qgsmaptoolreshape.h
+++ b/src/app/qgsmaptoolreshape.h
@@ -26,7 +26,6 @@ class APP_EXPORT QgsMapToolReshape: public QgsMapToolCapture
 
   public:
     QgsMapToolReshape( QgsMapCanvas *canvas );
-    virtual ~QgsMapToolReshape();
     void cadCanvasReleaseEvent( QgsMapMouseEvent *e ) override;
 };
 
diff --git a/src/app/qgsmaptoolrotatefeature.cpp b/src/app/qgsmaptoolrotatefeature.cpp
index 14599f11153..fdecfa9e265 100644
--- a/src/app/qgsmaptoolrotatefeature.cpp
+++ b/src/app/qgsmaptoolrotatefeature.cpp
@@ -78,10 +78,6 @@ QgsAngleMagnetWidget::QgsAngleMagnetWidget( const QString &label, QWidget *paren
   setFocusProxy( mAngleSpinBox );
 }
 
-QgsAngleMagnetWidget::~QgsAngleMagnetWidget()
-{
-}
-
 void QgsAngleMagnetWidget::setAngle( double angle )
 {
   const int magnet = mMagnetSpinBox->value();
diff --git a/src/app/qgsmaptoolrotatefeature.h b/src/app/qgsmaptoolrotatefeature.h
index 9c276965129..c934c81403a 100644
--- a/src/app/qgsmaptoolrotatefeature.h
+++ b/src/app/qgsmaptoolrotatefeature.h
@@ -34,8 +34,6 @@ class APP_EXPORT QgsAngleMagnetWidget : public QWidget
 
     explicit QgsAngleMagnetWidget( const QString &label = QString(), QWidget *parent = nullptr );
 
-    ~QgsAngleMagnetWidget();
-
     void setAngle( double angle );
 
     double angle();
diff --git a/src/app/qgsmaptoolsplitfeatures.cpp b/src/app/qgsmaptoolsplitfeatures.cpp
index 0ce0c91ba2f..9c48bc085f2 100644
--- a/src/app/qgsmaptoolsplitfeatures.cpp
+++ b/src/app/qgsmaptoolsplitfeatures.cpp
@@ -29,11 +29,6 @@ QgsMapToolSplitFeatures::QgsMapToolSplitFeatures( QgsMapCanvas *canvas )
   mToolName = tr( "Split features" );
 }
 
-QgsMapToolSplitFeatures::~QgsMapToolSplitFeatures()
-{
-
-}
-
 void QgsMapToolSplitFeatures::cadCanvasReleaseEvent( QgsMapMouseEvent *e )
 {
   //check if we operate on a vector layer
diff --git a/src/app/qgsmaptoolsplitfeatures.h b/src/app/qgsmaptoolsplitfeatures.h
index aea06d115ae..9fee2c5d775 100644
--- a/src/app/qgsmaptoolsplitfeatures.h
+++ b/src/app/qgsmaptoolsplitfeatures.h
@@ -25,7 +25,6 @@ class APP_EXPORT QgsMapToolSplitFeatures: public QgsMapToolCapture
     Q_OBJECT
   public:
     QgsMapToolSplitFeatures( QgsMapCanvas *canvas );
-    virtual ~QgsMapToolSplitFeatures();
     void cadCanvasReleaseEvent( QgsMapMouseEvent *e ) override;
 };
 
diff --git a/src/app/qgsmaptoolsplitparts.cpp b/src/app/qgsmaptoolsplitparts.cpp
index 1d1238e3655..c70630ffed4 100644
--- a/src/app/qgsmaptoolsplitparts.cpp
+++ b/src/app/qgsmaptoolsplitparts.cpp
@@ -29,11 +29,6 @@ QgsMapToolSplitParts::QgsMapToolSplitParts( QgsMapCanvas *canvas )
   mToolName = tr( "Split parts" );
 }
 
-QgsMapToolSplitParts::~QgsMapToolSplitParts()
-{
-
-}
-
 void QgsMapToolSplitParts::cadCanvasReleaseEvent( QgsMapMouseEvent *e )
 {
   //check if we operate on a vector layer
diff --git a/src/app/qgsmaptoolsplitparts.h b/src/app/qgsmaptoolsplitparts.h
index 1c0ec0e170e..0f5ca3065e4 100644
--- a/src/app/qgsmaptoolsplitparts.h
+++ b/src/app/qgsmaptoolsplitparts.h
@@ -24,7 +24,6 @@ class QgsMapToolSplitParts: public QgsMapToolCapture
     Q_OBJECT
   public:
     explicit QgsMapToolSplitParts( QgsMapCanvas *canvas );
-    virtual ~QgsMapToolSplitParts();
     void cadCanvasReleaseEvent( QgsMapMouseEvent *e ) override;
 };
 
diff --git a/src/app/qgsmaptoolsvgannotation.cpp b/src/app/qgsmaptoolsvgannotation.cpp
index 3fa3eda40aa..0b21321d37e 100644
--- a/src/app/qgsmaptoolsvgannotation.cpp
+++ b/src/app/qgsmaptoolsvgannotation.cpp
@@ -25,11 +25,6 @@ QgsMapToolSvgAnnotation::QgsMapToolSvgAnnotation( QgsMapCanvas *canvas ): QgsMap
 
 }
 
-QgsMapToolSvgAnnotation::~QgsMapToolSvgAnnotation()
-{
-
-}
-
 QgsAnnotation *QgsMapToolSvgAnnotation::createItem() const
 {
   return new QgsSvgAnnotation();
diff --git a/src/app/qgsmaptoolsvgannotation.h b/src/app/qgsmaptoolsvgannotation.h
index a61ac1d3dda..3f2041c369e 100644
--- a/src/app/qgsmaptoolsvgannotation.h
+++ b/src/app/qgsmaptoolsvgannotation.h
@@ -27,7 +27,6 @@ class APP_EXPORT QgsMapToolSvgAnnotation: public QgsMapToolAnnotation
 
   public:
     QgsMapToolSvgAnnotation( QgsMapCanvas *canvas );
-    ~QgsMapToolSvgAnnotation();
   protected:
     QgsAnnotation *createItem() const override;
 };
diff --git a/src/app/qgsmaptooltextannotation.cpp b/src/app/qgsmaptooltextannotation.cpp
index f24c9b2393c..b52274b078d 100644
--- a/src/app/qgsmaptooltextannotation.cpp
+++ b/src/app/qgsmaptooltextannotation.cpp
@@ -25,11 +25,6 @@ QgsMapToolTextAnnotation::QgsMapToolTextAnnotation( QgsMapCanvas *canvas ): QgsM
 
 }
 
-QgsMapToolTextAnnotation::~QgsMapToolTextAnnotation()
-{
-
-}
-
 QgsAnnotation *QgsMapToolTextAnnotation::createItem() const
 {
   return new QgsTextAnnotation();
diff --git a/src/app/qgsmaptooltextannotation.h b/src/app/qgsmaptooltextannotation.h
index a7e1a503616..55762fd15b5 100644
--- a/src/app/qgsmaptooltextannotation.h
+++ b/src/app/qgsmaptooltextannotation.h
@@ -27,7 +27,6 @@ class APP_EXPORT QgsMapToolTextAnnotation: public QgsMapToolAnnotation
 
   public:
     QgsMapToolTextAnnotation( QgsMapCanvas *canvas );
-    ~QgsMapToolTextAnnotation();
 
   protected:
     QgsAnnotation *createItem() const override;
diff --git a/src/app/qgspointrotationitem.cpp b/src/app/qgspointrotationitem.cpp
index 5e7897a3c9d..7edc839de3c 100644
--- a/src/app/qgspointrotationitem.cpp
+++ b/src/app/qgspointrotationitem.cpp
@@ -31,11 +31,6 @@ QgsPointRotationItem::QgsPointRotationItem( QgsMapCanvas *canvas )
   setSymbol( im );
 }
 
-QgsPointRotationItem::~QgsPointRotationItem()
-{
-
-}
-
 void QgsPointRotationItem::paint( QPainter *painter )
 {
   if ( !painter )
diff --git a/src/app/qgspointrotationitem.h b/src/app/qgspointrotationitem.h
index 148613e3af7..70680d454b4 100644
--- a/src/app/qgspointrotationitem.h
+++ b/src/app/qgspointrotationitem.h
@@ -33,7 +33,6 @@ class APP_EXPORT QgsPointRotationItem: public QgsMapCanvasItem
     };
 
     QgsPointRotationItem( QgsMapCanvas *canvas );
-    ~QgsPointRotationItem();
 
     void paint( QPainter *painter ) override;
 
diff --git a/src/app/qgsrelationmanagerdialog.cpp b/src/app/qgsrelationmanagerdialog.cpp
index fe6b99f7f4b..b84d554d577 100644
--- a/src/app/qgsrelationmanagerdialog.cpp
+++ b/src/app/qgsrelationmanagerdialog.cpp
@@ -30,10 +30,6 @@ QgsRelationManagerDialog::QgsRelationManagerDialog( QgsRelationManager *relation
   connect( mRelationsTable->selectionModel(), &QItemSelectionModel::selectionChanged, this, &QgsRelationManagerDialog::onSelectionChanged );
 }
 
-QgsRelationManagerDialog::~QgsRelationManagerDialog()
-{
-}
-
 void QgsRelationManagerDialog::setLayers( const QList< QgsVectorLayer * > &layers )
 {
   mLayers = layers;
diff --git a/src/app/qgsrelationmanagerdialog.h b/src/app/qgsrelationmanagerdialog.h
index 4e7d6e8a942..949f0f7eafd 100644
--- a/src/app/qgsrelationmanagerdialog.h
+++ b/src/app/qgsrelationmanagerdialog.h
@@ -31,7 +31,6 @@ class APP_EXPORT QgsRelationManagerDialog : public QWidget, private Ui::QgsRelat
 
   public:
     explicit QgsRelationManagerDialog( QgsRelationManager *relationMgr, QWidget *parent = nullptr );
-    ~QgsRelationManagerDialog();
 
     void setLayers( const QList<QgsVectorLayer *> & );
 
diff --git a/src/app/qgssnappinglayertreemodel.cpp b/src/app/qgssnappinglayertreemodel.cpp
index e3adf7e5a20..1a39037fb60 100644
--- a/src/app/qgssnappinglayertreemodel.cpp
+++ b/src/app/qgssnappinglayertreemodel.cpp
@@ -147,10 +147,6 @@ QgsSnappingLayerTreeModel::QgsSnappingLayerTreeModel( QgsProject *project, QObje
   connect( project, &QgsProject::avoidIntersectionsLayersChanged, this, &QgsSnappingLayerTreeModel::onSnappingSettingsChanged );
 }
 
-QgsSnappingLayerTreeModel::~QgsSnappingLayerTreeModel()
-{
-}
-
 int QgsSnappingLayerTreeModel::columnCount( const QModelIndex &parent ) const
 {
   Q_UNUSED( parent );
diff --git a/src/app/qgssnappinglayertreemodel.h b/src/app/qgssnappinglayertreemodel.h
index f81a3e5e17b..f50e9dfb767 100644
--- a/src/app/qgssnappinglayertreemodel.h
+++ b/src/app/qgssnappinglayertreemodel.h
@@ -60,7 +60,6 @@ class APP_EXPORT QgsSnappingLayerTreeModel : public QSortFilterProxyModel
     };
 
     QgsSnappingLayerTreeModel( QgsProject *project, QObject *parent = nullptr );
-    ~QgsSnappingLayerTreeModel();
 
     int columnCount( const QModelIndex &parent ) const override;
     QVariant headerData( int section, Qt::Orientation orientation, int role ) const override;
diff --git a/src/app/qgsstatisticalsummarydockwidget.cpp b/src/app/qgsstatisticalsummarydockwidget.cpp
index 9de8930bcad..176da8d6aa4 100644
--- a/src/app/qgsstatisticalsummarydockwidget.cpp
+++ b/src/app/qgsstatisticalsummarydockwidget.cpp
@@ -101,11 +101,6 @@ QgsStatisticalSummaryDockWidget::QgsStatisticalSummaryDockWidget( QWidget *paren
   refreshStatisticsMenu();
 }
 
-QgsStatisticalSummaryDockWidget::~QgsStatisticalSummaryDockWidget()
-{
-
-}
-
 void QgsStatisticalSummaryDockWidget::refreshStatistics()
 {
   if ( !mLayer || ( mFieldExpressionWidget->isExpression() && !mFieldExpressionWidget->isValidExpression() ) )
diff --git a/src/app/qgsstatisticalsummarydockwidget.h b/src/app/qgsstatisticalsummarydockwidget.h
index b2e5f90db8c..21c3d1e1332 100644
--- a/src/app/qgsstatisticalsummarydockwidget.h
+++ b/src/app/qgsstatisticalsummarydockwidget.h
@@ -40,7 +40,6 @@ class APP_EXPORT QgsStatisticalSummaryDockWidget : public QgsDockWidget, private
 
   public:
     QgsStatisticalSummaryDockWidget( QWidget *parent = nullptr );
-    ~QgsStatisticalSummaryDockWidget();
 
     /** Returns the currently active layer for the widget
      * \since QGIS 2.12
diff --git a/src/app/qgsstatusbarmagnifierwidget.cpp b/src/app/qgsstatusbarmagnifierwidget.cpp
index e4d74432396..4e5dd5584f8 100644
--- a/src/app/qgsstatusbarmagnifierwidget.cpp
+++ b/src/app/qgsstatusbarmagnifierwidget.cpp
@@ -66,10 +66,6 @@ QgsStatusBarMagnifierWidget::QgsStatusBarMagnifierWidget( QWidget *parent )
   setLayout( mLayout );
 }
 
-QgsStatusBarMagnifierWidget::~QgsStatusBarMagnifierWidget()
-{
-}
-
 void QgsStatusBarMagnifierWidget::setDefaultFactor( double factor )
 {
   mSpinBox->setClearValue( ( int )100 * factor );
diff --git a/src/app/qgsstatusbarmagnifierwidget.h b/src/app/qgsstatusbarmagnifierwidget.h
index f291191ccc0..7118c7d5ec9 100644
--- a/src/app/qgsstatusbarmagnifierwidget.h
+++ b/src/app/qgsstatusbarmagnifierwidget.h
@@ -41,9 +41,6 @@ class APP_EXPORT QgsStatusBarMagnifierWidget : public QWidget
       */
     QgsStatusBarMagnifierWidget( QWidget *parent = nullptr );
 
-
-    virtual ~QgsStatusBarMagnifierWidget();
-
     void setDefaultFactor( double factor );
 
     /** Set the font of the text
diff --git a/src/app/qgsstatusbarscalewidget.cpp b/src/app/qgsstatusbarscalewidget.cpp
index 10091f56001..b7673d075c0 100644
--- a/src/app/qgsstatusbarscalewidget.cpp
+++ b/src/app/qgsstatusbarscalewidget.cpp
@@ -73,10 +73,6 @@ QgsStatusBarScaleWidget::QgsStatusBarScaleWidget( QgsMapCanvas *canvas, QWidget
   connect( mLockButton, &QAbstractButton::toggled, mScale, &QWidget::setDisabled );
 }
 
-QgsStatusBarScaleWidget::~QgsStatusBarScaleWidget()
-{
-}
-
 void QgsStatusBarScaleWidget::setScale( double scale )
 {
   mScale->blockSignals( true );
diff --git a/src/app/qgsstatusbarscalewidget.h b/src/app/qgsstatusbarscalewidget.h
index dac2bf7fa67..b5402e78131 100644
--- a/src/app/qgsstatusbarscalewidget.h
+++ b/src/app/qgsstatusbarscalewidget.h
@@ -40,9 +40,6 @@ class APP_EXPORT QgsStatusBarScaleWidget : public QWidget
   public:
     explicit QgsStatusBarScaleWidget( QgsMapCanvas *canvas, QWidget *parent = 0 );
 
-
-    virtual ~QgsStatusBarScaleWidget();
-
     /**
      * Set the selected \a scale from double.
      * The \a scale value indicates the scale denominator, e.g. 1000.0 for a 1:1000 map.
diff --git a/src/app/qgssvgannotationdialog.cpp b/src/app/qgssvgannotationdialog.cpp
index c5b68b27179..84250fb3513 100644
--- a/src/app/qgssvgannotationdialog.cpp
+++ b/src/app/qgssvgannotationdialog.cpp
@@ -56,11 +56,6 @@ QgsSvgAnnotationDialog::QgsSvgAnnotationDialog()
 
 }
 
-QgsSvgAnnotationDialog::~QgsSvgAnnotationDialog()
-{
-
-}
-
 void QgsSvgAnnotationDialog::on_mBrowseToolButton_clicked()
 {
   QString directory;
diff --git a/src/app/qgssvgannotationdialog.h b/src/app/qgssvgannotationdialog.h
index bf51298d5a0..c75a6fdd205 100644
--- a/src/app/qgssvgannotationdialog.h
+++ b/src/app/qgssvgannotationdialog.h
@@ -29,7 +29,6 @@ class APP_EXPORT QgsSvgAnnotationDialog: public QDialog, private Ui::QgsFormAnno
     Q_OBJECT
   public:
     QgsSvgAnnotationDialog( QgsMapCanvasAnnotationItem *item, QWidget *parent = nullptr, Qt::WindowFlags f = 0 );
-    ~QgsSvgAnnotationDialog();
 
   private slots:
     void on_mBrowseToolButton_clicked();
diff --git a/src/app/qgsvectorlayerproperties.cpp b/src/app/qgsvectorlayerproperties.cpp
index 305e1641dba..3237ee41bb9 100644
--- a/src/app/qgsvectorlayerproperties.cpp
+++ b/src/app/qgsvectorlayerproperties.cpp
@@ -332,11 +332,6 @@ QgsVectorLayerProperties::QgsVectorLayerProperties(
 
   connect( mRefreshLayerCheckBox, &QCheckBox::toggled, mRefreshLayerIntervalSpinBox, &QDoubleSpinBox::setEnabled );
 
-} // QgsVectorLayerProperties ctor
-
-
-QgsVectorLayerProperties::~QgsVectorLayerProperties()
-{
 }
 
 void QgsVectorLayerProperties::toggleEditing()
diff --git a/src/app/qgsvectorlayerproperties.h b/src/app/qgsvectorlayerproperties.h
index d2cb7c213bd..073f8e084ce 100644
--- a/src/app/qgsvectorlayerproperties.h
+++ b/src/app/qgsvectorlayerproperties.h
@@ -55,7 +55,7 @@ class APP_EXPORT QgsVectorLayerProperties : public QgsOptionsDialogBase, private
     };
 
     QgsVectorLayerProperties( QgsVectorLayer *lyr = nullptr, QWidget *parent = nullptr, Qt::WindowFlags fl = QgsGuiUtils::ModalDialogFlags );
-    ~QgsVectorLayerProperties();
+
     //! Returns the display name entered in the dialog
     QString displayName();
     void setRendererDirty( bool ) {}
diff --git a/src/core/diagram/qgsdiagram.cpp b/src/core/diagram/qgsdiagram.cpp
index 4b0aa088dd5..5c232248185 100644
--- a/src/core/diagram/qgsdiagram.cpp
+++ b/src/core/diagram/qgsdiagram.cpp
@@ -20,13 +20,6 @@
 
 #include <QPainter>
 
-
-
-QgsDiagram::QgsDiagram()
-{
-
-}
-
 QgsDiagram::QgsDiagram( const QgsDiagram &other )
 {
   Q_UNUSED( other );
diff --git a/src/core/diagram/qgsdiagram.h b/src/core/diagram/qgsdiagram.h
index afce3152a4e..50634f6baa4 100644
--- a/src/core/diagram/qgsdiagram.h
+++ b/src/core/diagram/qgsdiagram.h
@@ -73,7 +73,7 @@ class CORE_EXPORT QgsDiagram
     virtual double legendSize( double value, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &is ) const = 0;
 
   protected:
-    QgsDiagram();
+    QgsDiagram() = default;
     QgsDiagram( const QgsDiagram &other );
 
     /** Changes the pen width to match the current settings and rendering context
diff --git a/src/core/fieldformatter/qgsvaluerelationfieldformatter.cpp b/src/core/fieldformatter/qgsvaluerelationfieldformatter.cpp
index f6fbb741467..d8050fed636 100644
--- a/src/core/fieldformatter/qgsvaluerelationfieldformatter.cpp
+++ b/src/core/fieldformatter/qgsvaluerelationfieldformatter.cpp
@@ -31,12 +31,6 @@ bool orderByValueLessThan( const QgsValueRelationFieldFormatter::ValueRelationIt
   return qgsVariantLessThan( p1.value, p2.value );
 }
 
-
-QgsValueRelationFieldFormatter::QgsValueRelationFieldFormatter()
-{
-
-}
-
 QString QgsValueRelationFieldFormatter::id() const
 {
   return QStringLiteral( "ValueRelation" );
diff --git a/src/core/fieldformatter/qgsvaluerelationfieldformatter.h b/src/core/fieldformatter/qgsvaluerelationfieldformatter.h
index be183d6cfc9..ea42d30203d 100644
--- a/src/core/fieldformatter/qgsvaluerelationfieldformatter.h
+++ b/src/core/fieldformatter/qgsvaluerelationfieldformatter.h
@@ -49,7 +49,7 @@ class CORE_EXPORT QgsValueRelationFieldFormatter : public QgsFieldFormatter
 
     typedef QVector < QgsValueRelationFieldFormatter::ValueRelationItem > ValueRelationCache;
 
-    QgsValueRelationFieldFormatter();
+    QgsValueRelationFieldFormatter() = default;
 
     QString id() const override;
     QString representValue( QgsVectorLayer *layer, int fieldIndex, const QVariantMap &config, const QVariant &cache, const QVariant &value ) const override;
diff --git a/src/core/gps/qgsgpsconnectionregistry.cpp b/src/core/gps/qgsgpsconnectionregistry.cpp
index 3b84fbb1bf8..d0a46b342d7 100644
--- a/src/core/gps/qgsgpsconnectionregistry.cpp
+++ b/src/core/gps/qgsgpsconnectionregistry.cpp
@@ -18,10 +18,6 @@
 #include "qgsgpsconnectionregistry.h"
 #include "qgsgpsconnection.h"
 
-QgsGPSConnectionRegistry::QgsGPSConnectionRegistry()
-{
-}
-
 QgsGPSConnectionRegistry::~QgsGPSConnectionRegistry()
 {
   qDeleteAll( mConnections );
diff --git a/src/core/gps/qgsgpsconnectionregistry.h b/src/core/gps/qgsgpsconnectionregistry.h
index f237624834c..936319aca67 100644
--- a/src/core/gps/qgsgpsconnectionregistry.h
+++ b/src/core/gps/qgsgpsconnectionregistry.h
@@ -35,7 +35,7 @@ class QgsGPSConnection;
 class CORE_EXPORT QgsGPSConnectionRegistry
 {
   public:
-    QgsGPSConnectionRegistry();
+    QgsGPSConnectionRegistry() = default;
     ~QgsGPSConnectionRegistry();
 
     //! QgsGPSConnectionRegistry cannot be copied.
diff --git a/src/core/qgscolorscheme.cpp b/src/core/qgscolorscheme.cpp
index 94414700d87..17bda399667 100644
--- a/src/core/qgscolorscheme.cpp
+++ b/src/core/qgscolorscheme.cpp
@@ -198,11 +198,6 @@ QgsCustomColorScheme *QgsCustomColorScheme::clone() const
 }
 
 
-QgsProjectColorScheme::QgsProjectColorScheme()
-{
-
-}
-
 QgsNamedColorList QgsProjectColorScheme::fetchColors( const QString &context, const QColor &baseColor )
 {
   Q_UNUSED( context );
diff --git a/src/core/qgscolorscheme.h b/src/core/qgscolorscheme.h
index 5101de177cf..0b897f8c289 100644
--- a/src/core/qgscolorscheme.h
+++ b/src/core/qgscolorscheme.h
@@ -268,7 +268,7 @@ class CORE_EXPORT QgsProjectColorScheme : public QgsColorScheme
 {
   public:
 
-    QgsProjectColorScheme();
+    QgsProjectColorScheme() = default;
 
     virtual QString schemeName() const override { return QObject::tr( "Project colors" ); }
 
diff --git a/src/core/qgscolorschemeregistry.cpp b/src/core/qgscolorschemeregistry.cpp
index 17f843d4168..50280edd577 100644
--- a/src/core/qgscolorschemeregistry.cpp
+++ b/src/core/qgscolorschemeregistry.cpp
@@ -22,10 +22,6 @@
 #include <QFileInfoList>
 
 
-QgsColorSchemeRegistry::QgsColorSchemeRegistry()
-{
-}
-
 QgsColorSchemeRegistry::~QgsColorSchemeRegistry()
 {
   qDeleteAll( mColorSchemeList );
diff --git a/src/core/qgscolorschemeregistry.h b/src/core/qgscolorschemeregistry.h
index 852ecf503cc..dc5afc68ab5 100644
--- a/src/core/qgscolorschemeregistry.h
+++ b/src/core/qgscolorschemeregistry.h
@@ -37,7 +37,7 @@ class CORE_EXPORT QgsColorSchemeRegistry
 
     /** Constructor for an empty color scheme registry
      */
-    QgsColorSchemeRegistry();
+    QgsColorSchemeRegistry() = default;
 
     virtual ~QgsColorSchemeRegistry();
 
diff --git a/src/core/qgscredentials.cpp b/src/core/qgscredentials.cpp
index f197f8775cf..7fb82da6f51 100644
--- a/src/core/qgscredentials.cpp
+++ b/src/core/qgscredentials.cpp
@@ -38,10 +38,6 @@ QgsCredentials *QgsCredentials::instance()
   return new QgsCredentialsNone();
 }
 
-QgsCredentials::QgsCredentials()
-{
-}
-
 bool QgsCredentials::get( const QString &realm, QString &username, QString &password, const QString &message )
 {
   if ( mCredentialCache.contains( realm ) )
diff --git a/src/core/qgscredentials.h b/src/core/qgscredentials.h
index 161c876a0eb..8f6f230d2a1 100644
--- a/src/core/qgscredentials.h
+++ b/src/core/qgscredentials.h
@@ -72,7 +72,7 @@ class CORE_EXPORT QgsCredentials
     QMutex *mutex() { return &mMutex; }
 
   protected:
-    QgsCredentials();
+    QgsCredentials() = default;
 
     //! request a password
     virtual bool request( const QString &realm, QString &username SIP_INOUT, QString &password SIP_INOUT, const QString &message = QString() ) = 0;
diff --git a/src/core/qgscrscache.cpp b/src/core/qgscrscache.cpp
index efdd8f79443..11deb3c5c9e 100644
--- a/src/core/qgscrscache.cpp
+++ b/src/core/qgscrscache.cpp
@@ -25,10 +25,6 @@ QgsCoordinateTransformCache *QgsCoordinateTransformCache::instance()
   return &sInstance;
 }
 
-QgsCoordinateTransformCache::QgsCoordinateTransformCache()
-{
-}
-
 QgsCoordinateTransform QgsCoordinateTransformCache::transform( const QString &srcAuthId, const QString &destAuthId, int srcDatumTransform, int destDatumTransform )
 {
   QList< QgsCoordinateTransform > values =
diff --git a/src/core/qgscrscache.h b/src/core/qgscrscache.h
index 9946106034e..0c04df6e967 100644
--- a/src/core/qgscrscache.h
+++ b/src/core/qgscrscache.h
@@ -53,7 +53,7 @@ class CORE_EXPORT QgsCoordinateTransformCache
   private:
     QMultiHash< QPair< QString, QString >, QgsCoordinateTransform > mTransforms; //same auth_id pairs might have different datum transformations
 
-    QgsCoordinateTransformCache();
+    QgsCoordinateTransformCache() = default;
 
 #ifdef SIP_RUN
     QgsCoordinateTransformCache( const QgsCoordinateTransformCache &rh );
diff --git a/src/core/qgsdatadefinedsizelegend.cpp b/src/core/qgsdatadefinedsizelegend.cpp
index 8b221572a52..cff5d55fd7d 100644
--- a/src/core/qgsdatadefinedsizelegend.cpp
+++ b/src/core/qgsdatadefinedsizelegend.cpp
@@ -20,9 +20,6 @@
 #include "qgssymbollayerutils.h"
 #include "qgsxmlutils.h"
 
-QgsDataDefinedSizeLegend::QgsDataDefinedSizeLegend()
-{
-}
 
 QgsDataDefinedSizeLegend::QgsDataDefinedSizeLegend( const QgsDataDefinedSizeLegend &other )
   : mType( other.mType )
diff --git a/src/core/qgsdatadefinedsizelegend.h b/src/core/qgsdatadefinedsizelegend.h
index c7436274f55..f8e5f796f58 100644
--- a/src/core/qgsdatadefinedsizelegend.h
+++ b/src/core/qgsdatadefinedsizelegend.h
@@ -39,7 +39,7 @@ class QgsSizeScaleTransformer;
 class CORE_EXPORT QgsDataDefinedSizeLegend
 {
   public:
-    QgsDataDefinedSizeLegend();
+    QgsDataDefinedSizeLegend() = default;
 
     //! Copy constructor
     QgsDataDefinedSizeLegend( const QgsDataDefinedSizeLegend &other );
diff --git a/src/core/qgsdiagramrenderer.h b/src/core/qgsdiagramrenderer.h
index dab887aaa5f..11dd64f2cfa 100644
--- a/src/core/qgsdiagramrenderer.h
+++ b/src/core/qgsdiagramrenderer.h
@@ -30,9 +30,8 @@
 #include "qgssymbol.h"
 #include "qgsproperty.h"
 #include "qgspropertycollection.h"
+#include "qgsdatadefinedsizelegend.h"
 
-
-class QgsDataDefinedSizeLegend;
 class QgsDiagram;
 class QgsDiagramRenderer;
 class QgsFeature;
diff --git a/src/core/qgsexpressionfieldbuffer.cpp b/src/core/qgsexpressionfieldbuffer.cpp
index 9783aa277fd..0dd8cfdfeab 100644
--- a/src/core/qgsexpressionfieldbuffer.cpp
+++ b/src/core/qgsexpressionfieldbuffer.cpp
@@ -19,9 +19,6 @@
 
 #include "qgsvectorlayer.h"
 
-QgsExpressionFieldBuffer::QgsExpressionFieldBuffer()
-{
-}
 
 void QgsExpressionFieldBuffer::addExpression( const QString &exp, const QgsField &fld )
 {
diff --git a/src/core/qgsexpressionfieldbuffer.h b/src/core/qgsexpressionfieldbuffer.h
index c10e9162b4b..6c78ea07c51 100644
--- a/src/core/qgsexpressionfieldbuffer.h
+++ b/src/core/qgsexpressionfieldbuffer.h
@@ -45,7 +45,7 @@ class CORE_EXPORT QgsExpressionFieldBuffer
       QgsField field;
     };
 
-    QgsExpressionFieldBuffer();
+    QgsExpressionFieldBuffer() = default;
 
     /**
      * Add an expression to the buffer
diff --git a/src/core/qgsfeaturestore.cpp b/src/core/qgsfeaturestore.cpp
index 3fdcf8da532..6bd34070ac7 100644
--- a/src/core/qgsfeaturestore.cpp
+++ b/src/core/qgsfeaturestore.cpp
@@ -15,9 +15,6 @@
 
 #include "qgsfeaturestore.h"
 
-QgsFeatureStore::QgsFeatureStore()
-{
-}
 
 QgsFeatureStore::QgsFeatureStore( const QgsFields &fields, const QgsCoordinateReferenceSystem &crs )
   : mFields( fields )
diff --git a/src/core/qgsfeaturestore.h b/src/core/qgsfeaturestore.h
index e788bb613ad..177e6862cce 100644
--- a/src/core/qgsfeaturestore.h
+++ b/src/core/qgsfeaturestore.h
@@ -32,7 +32,7 @@ class CORE_EXPORT QgsFeatureStore : public QgsFeatureSink
 {
   public:
     //! Constructor
-    QgsFeatureStore();
+    QgsFeatureStore() = default;
 
     //! Constructor
     QgsFeatureStore( const QgsFields &fields, const QgsCoordinateReferenceSystem &crs );
diff --git a/src/core/qgsgmlschema.cpp b/src/core/qgsgmlschema.cpp
index 6ad4ab136c7..138c0b01f83 100644
--- a/src/core/qgsgmlschema.cpp
+++ b/src/core/qgsgmlschema.cpp
@@ -33,9 +33,6 @@
 const char NS_SEPARATOR = '?';
 const QString GML_NAMESPACE = QStringLiteral( "http://www.opengis.net/gml" );
 
-QgsGmlFeatureClass::QgsGmlFeatureClass()
-{
-}
 
 QgsGmlFeatureClass::QgsGmlFeatureClass( const QString &name, const QString &path )
   : mName( name )
diff --git a/src/core/qgsgmlschema.h b/src/core/qgsgmlschema.h
index 7b81f2cb53f..24ecaa18d12 100644
--- a/src/core/qgsgmlschema.h
+++ b/src/core/qgsgmlschema.h
@@ -39,7 +39,7 @@ class QgsFeature;
 class CORE_EXPORT QgsGmlFeatureClass
 {
   public:
-    QgsGmlFeatureClass();
+    QgsGmlFeatureClass() = default;
     QgsGmlFeatureClass( const QString &name, const QString &path );
 
     QList<QgsField> &fields() { return  mFields; }
diff --git a/src/core/qgslabelsearchtree.cpp b/src/core/qgslabelsearchtree.cpp
index 15acc6b7e13..b09d2cc4eb3 100644
--- a/src/core/qgslabelsearchtree.cpp
+++ b/src/core/qgslabelsearchtree.cpp
@@ -22,10 +22,6 @@ bool searchCallback( QgsLabelPosition *pos, void *context )
   return true;
 }
 
-QgsLabelSearchTree::QgsLabelSearchTree()
-{
-}
-
 QgsLabelSearchTree::~QgsLabelSearchTree()
 {
   clear();
diff --git a/src/core/qgslabelsearchtree.h b/src/core/qgslabelsearchtree.h
index f9577a95c05..6ff74f32e74 100644
--- a/src/core/qgslabelsearchtree.h
+++ b/src/core/qgslabelsearchtree.h
@@ -36,7 +36,7 @@ class QgsPointXY;
 class CORE_EXPORT QgsLabelSearchTree
 {
   public:
-    QgsLabelSearchTree();
+    QgsLabelSearchTree() = default;
     ~QgsLabelSearchTree();
 
     //! QgsLabelSearchTree cannot be copied.
diff --git a/src/core/qgsmapdecoration.cpp b/src/core/qgsmapdecoration.cpp
index e3039bc8ebb..e1cda8321f7 100644
--- a/src/core/qgsmapdecoration.cpp
+++ b/src/core/qgsmapdecoration.cpp
@@ -16,7 +16,3 @@
  ***************************************************************************/
 
 #include "qgsmapdecoration.h"
-
-QgsMapDecoration::QgsMapDecoration()
-{
-}
diff --git a/src/core/qgsmapdecoration.h b/src/core/qgsmapdecoration.h
index e15508e6ee1..4e919604807 100644
--- a/src/core/qgsmapdecoration.h
+++ b/src/core/qgsmapdecoration.h
@@ -37,7 +37,7 @@ class CORE_EXPORT QgsMapDecoration
     /**
      * Constructor for QgsMapDecoration.
      */
-    QgsMapDecoration();
+    QgsMapDecoration() = default;
 
     virtual ~QgsMapDecoration() = default;
 
diff --git a/src/core/qgsmaplayerstylemanager.cpp b/src/core/qgsmaplayerstylemanager.cpp
index 5ccdd4d6039..2dff6c0e6df 100644
--- a/src/core/qgsmaplayerstylemanager.cpp
+++ b/src/core/qgsmaplayerstylemanager.cpp
@@ -227,10 +227,6 @@ bool QgsMapLayerStyleManager::restoreOverrideStyle()
 
 // -----
 
-QgsMapLayerStyle::QgsMapLayerStyle()
-{
-}
-
 QgsMapLayerStyle::QgsMapLayerStyle( const QString &xmlData )
   : mXmlData( xmlData )
 {
diff --git a/src/core/qgsmaplayerstylemanager.h b/src/core/qgsmaplayerstylemanager.h
index 4edd06df437..17673c53f1f 100644
--- a/src/core/qgsmaplayerstylemanager.h
+++ b/src/core/qgsmaplayerstylemanager.h
@@ -40,7 +40,7 @@ class CORE_EXPORT QgsMapLayerStyle
 {
   public:
     //! construct invalid style
-    QgsMapLayerStyle();
+    QgsMapLayerStyle() = default;
 
     //! construct style from QML definition (XML)
     explicit QgsMapLayerStyle( const QString &xmlData );
diff --git a/src/core/qgsmimedatautils.cpp b/src/core/qgsmimedatautils.cpp
index 7c625efc003..a0ca32fb5bf 100644
--- a/src/core/qgsmimedatautils.cpp
+++ b/src/core/qgsmimedatautils.cpp
@@ -27,10 +27,6 @@
 
 static const char *QGIS_URILIST_MIMETYPE = "application/x-vnd.qgis.qgis.uri";
 
-QgsMimeDataUtils::Uri::Uri()
-{
-}
-
 QgsMimeDataUtils::Uri::Uri( QString &encData )
 {
   QgsDebugMsg( "encData: " + encData );
diff --git a/src/core/qgsmimedatautils.h b/src/core/qgsmimedatautils.h
index 93eaeaf4736..af85d6afcc2 100644
--- a/src/core/qgsmimedatautils.h
+++ b/src/core/qgsmimedatautils.h
@@ -35,7 +35,7 @@ class CORE_EXPORT QgsMimeDataUtils
     struct CORE_EXPORT Uri
     {
       //! Constructs invalid URI
-      Uri();
+      Uri() = default;
       //! Constructs URI from encoded data
       explicit Uri( QString &encData );
 
diff --git a/src/core/qgsnetworkaccessmanager.cpp b/src/core/qgsnetworkaccessmanager.cpp
index 9ae15e44b3a..1d32abc955b 100644
--- a/src/core/qgsnetworkaccessmanager.cpp
+++ b/src/core/qgsnetworkaccessmanager.cpp
@@ -48,7 +48,7 @@ QgsNetworkAccessManager *QgsNetworkAccessManager::sMainNAM = nullptr;
 class QgsNetworkProxyFactory : public QNetworkProxyFactory
 {
   public:
-    QgsNetworkProxyFactory() {}
+    QgsNetworkProxyFactory() = default;
 
     QList<QNetworkProxy> queryProxy( const QNetworkProxyQuery &query = QNetworkProxyQuery() ) override
     {
diff --git a/src/core/qgsobjectcustomproperties.cpp b/src/core/qgsobjectcustomproperties.cpp
index 0f4d1ccbef4..6e7e401c50c 100644
--- a/src/core/qgsobjectcustomproperties.cpp
+++ b/src/core/qgsobjectcustomproperties.cpp
@@ -21,10 +21,6 @@
 #include <QStringList>
 
 
-QgsObjectCustomProperties::QgsObjectCustomProperties()
-{
-}
-
 QStringList QgsObjectCustomProperties::keys() const
 {
   return mMap.keys();
diff --git a/src/core/qgsobjectcustomproperties.h b/src/core/qgsobjectcustomproperties.h
index 87d03161891..70790cd8ea5 100644
--- a/src/core/qgsobjectcustomproperties.h
+++ b/src/core/qgsobjectcustomproperties.h
@@ -34,7 +34,7 @@ class QDomNode;
 class CORE_EXPORT QgsObjectCustomProperties
 {
   public:
-    QgsObjectCustomProperties();
+    QgsObjectCustomProperties() = default;
 
     //! Return list of stored keys
     QStringList keys() const;
diff --git a/src/core/qgspluginlayerregistry.cpp b/src/core/qgspluginlayerregistry.cpp
index 8eabe2ff36a..3ebbffb6ae3 100644
--- a/src/core/qgspluginlayerregistry.cpp
+++ b/src/core/qgspluginlayerregistry.cpp
@@ -52,10 +52,6 @@ bool QgsPluginLayerType::showLayerProperties( QgsPluginLayer *layer )
 // QgsPluginLayerRegistry
 //
 
-QgsPluginLayerRegistry::QgsPluginLayerRegistry()
-{
-}
-
 QgsPluginLayerRegistry::~QgsPluginLayerRegistry()
 {
   if ( !mPluginLayerTypes.isEmpty() )
diff --git a/src/core/qgspluginlayerregistry.h b/src/core/qgspluginlayerregistry.h
index ef77bde85e4..5dce55b93cb 100644
--- a/src/core/qgspluginlayerregistry.h
+++ b/src/core/qgspluginlayerregistry.h
@@ -66,7 +66,7 @@ class CORE_EXPORT QgsPluginLayerRegistry
 {
   public:
 
-    QgsPluginLayerRegistry();
+    QgsPluginLayerRegistry() = default;
     ~QgsPluginLayerRegistry();
 
     //! QgsPluginLayerRegistry cannot be copied.
diff --git a/src/core/qgspropertycollection.cpp b/src/core/qgspropertycollection.cpp
index b455409e3e8..7d3982fc80c 100644
--- a/src/core/qgspropertycollection.cpp
+++ b/src/core/qgspropertycollection.cpp
@@ -359,9 +359,6 @@ bool QgsPropertyCollection::loadVariant( const QVariant &collection, const QgsPr
 // QgsPropertyCollectionStack
 //
 
-QgsPropertyCollectionStack::QgsPropertyCollectionStack()
-{}
-
 QgsPropertyCollectionStack::~QgsPropertyCollectionStack()
 {
   clear();
diff --git a/src/core/qgspropertycollection.h b/src/core/qgspropertycollection.h
index 1a0be9d5133..0751bc23133 100644
--- a/src/core/qgspropertycollection.h
+++ b/src/core/qgspropertycollection.h
@@ -368,7 +368,7 @@ class CORE_EXPORT QgsPropertyCollectionStack : public QgsAbstractPropertyCollect
 {
   public:
 
-    QgsPropertyCollectionStack();
+    QgsPropertyCollectionStack() = default;
 
     ~QgsPropertyCollectionStack();
 
diff --git a/src/core/qgspropertytransformer.cpp b/src/core/qgspropertytransformer.cpp
index 0f62f7bc289..f8f2a868f3f 100644
--- a/src/core/qgspropertytransformer.cpp
+++ b/src/core/qgspropertytransformer.cpp
@@ -135,24 +135,6 @@ QgsGenericNumericTransformer::QgsGenericNumericTransformer( double minValue, dou
   , mExponent( exponent )
 {}
 
-QgsGenericNumericTransformer::QgsGenericNumericTransformer( const QgsGenericNumericTransformer &other )
-  : QgsPropertyTransformer( other )
-  , mMinOutput( other.mMinOutput )
-  , mMaxOutput( other.mMaxOutput )
-  , mNullOutput( other.mNullOutput )
-  , mExponent( other.mExponent )
-{}
-
-QgsGenericNumericTransformer &QgsGenericNumericTransformer::operator=( const QgsGenericNumericTransformer &other )
-{
-  QgsPropertyTransformer::operator=( other );
-  mMinOutput = other.mMinOutput;
-  mMaxOutput = other.mMaxOutput;
-  mNullOutput = other.mNullOutput;
-  mExponent = other.mExponent;
-  return *this;
-}
-
 QgsGenericNumericTransformer *QgsGenericNumericTransformer::clone() const
 {
   std::unique_ptr< QgsGenericNumericTransformer > t( new QgsGenericNumericTransformer( mMinValue,
@@ -325,26 +307,6 @@ QgsSizeScaleTransformer::QgsSizeScaleTransformer( ScaleType type, double minValu
   setType( type );
 }
 
-QgsSizeScaleTransformer::QgsSizeScaleTransformer( const QgsSizeScaleTransformer &other )
-  : QgsPropertyTransformer( other )
-  , mType( other.mType )
-  , mMinSize( other.mMinSize )
-  , mMaxSize( other.mMaxSize )
-  , mNullSize( other.mNullSize )
-  , mExponent( other.mExponent )
-{}
-
-QgsSizeScaleTransformer &QgsSizeScaleTransformer::operator=( const QgsSizeScaleTransformer &other )
-{
-  QgsPropertyTransformer::operator=( other );
-  mType = other.mType;
-  mMinSize = other.mMinSize;
-  mMaxSize = other.mMaxSize;
-  mNullSize = other.mNullSize;
-  mExponent = other.mExponent;
-  return *this;
-}
-
 QgsSizeScaleTransformer *QgsSizeScaleTransformer::clone() const
 {
   std::unique_ptr< QgsSizeScaleTransformer > t( new QgsSizeScaleTransformer( mType,
diff --git a/src/core/qgspropertytransformer.h b/src/core/qgspropertytransformer.h
index f23a11cc575..adc2e2cb269 100644
--- a/src/core/qgspropertytransformer.h
+++ b/src/core/qgspropertytransformer.h
@@ -360,12 +360,6 @@ class CORE_EXPORT QgsGenericNumericTransformer : public QgsPropertyTransformer
                                   double nullOutput = 0.0,
                                   double exponent = 1.0 );
 
-    /**
-     * Copy constructor.
-     */
-    QgsGenericNumericTransformer( const QgsGenericNumericTransformer &other );
-    QgsGenericNumericTransformer &operator=( const QgsGenericNumericTransformer &other );
-
     virtual Type transformerType() const override { return GenericNumericTransformer; }
     virtual QgsGenericNumericTransformer *clone() const override SIP_FACTORY;
     virtual QVariant toVariant() const override;
@@ -496,12 +490,6 @@ class CORE_EXPORT QgsSizeScaleTransformer : public QgsPropertyTransformer
                              double nullSize = 0.0,
                              double exponent = 1.0 );
 
-    /**
-     * Copy constructor.
-     */
-    QgsSizeScaleTransformer( const QgsSizeScaleTransformer &other );
-    QgsSizeScaleTransformer &operator=( const QgsSizeScaleTransformer &other );
-
     virtual Type transformerType() const override { return SizeScaleTransformer; }
     virtual QgsSizeScaleTransformer *clone() const override SIP_FACTORY;
     virtual QVariant toVariant() const override;
diff --git a/src/core/qgsreadwritecontext.cpp b/src/core/qgsreadwritecontext.cpp
index 9e08f9525d6..d0259d57f84 100644
--- a/src/core/qgsreadwritecontext.cpp
+++ b/src/core/qgsreadwritecontext.cpp
@@ -1,6 +1 @@
 #include "qgsreadwritecontext.h"
-
-QgsReadWriteContext::QgsReadWriteContext()
-{
-
-}
diff --git a/src/core/qgsreadwritecontext.h b/src/core/qgsreadwritecontext.h
index 056708879f5..e21a9c7c0f4 100644
--- a/src/core/qgsreadwritecontext.h
+++ b/src/core/qgsreadwritecontext.h
@@ -29,7 +29,7 @@
 class CORE_EXPORT QgsReadWriteContext
 {
   public:
-    QgsReadWriteContext();
+    QgsReadWriteContext() = default;
 
     //! Returns path resolver for conversion between relative and absolute paths
     const QgsPathResolver &pathResolver() const { return mPathResolver; }
diff --git a/src/core/qgsruntimeprofiler.cpp b/src/core/qgsruntimeprofiler.cpp
index 7dcf0f9cd9f..78f2991c46f 100644
--- a/src/core/qgsruntimeprofiler.cpp
+++ b/src/core/qgsruntimeprofiler.cpp
@@ -1,12 +1,6 @@
 #include "qgsruntimeprofiler.h"
 #include "qgslogger.h"
 
-
-QgsRuntimeProfiler::QgsRuntimeProfiler()
-{
-
-}
-
 void QgsRuntimeProfiler::beginGroup( const QString &name )
 {
   mGroupStack.push( name );
diff --git a/src/core/qgsruntimeprofiler.h b/src/core/qgsruntimeprofiler.h
index 4c7d26e14b6..55d12f0d837 100644
--- a/src/core/qgsruntimeprofiler.h
+++ b/src/core/qgsruntimeprofiler.h
@@ -18,7 +18,7 @@ class CORE_EXPORT QgsRuntimeProfiler
     /**
      * Constructor to create a new runtime profiler.
      */
-    QgsRuntimeProfiler();
+    QgsRuntimeProfiler() = default;
 
     /**
      * \brief Begin the group for the profiler. Groups will append {GroupName}/ to the
diff --git a/src/core/qgssqlstatement.cpp b/src/core/qgssqlstatement.cpp
index 5151be110f8..3665ecfb24b 100644
--- a/src/core/qgssqlstatement.cpp
+++ b/src/core/qgssqlstatement.cpp
@@ -198,7 +198,7 @@ class QgsSQLStatementCollectTableNames: public QgsSQLStatement::RecursiveVisitor
   public:
     typedef QPair<QString, QString> TableColumnPair;
 
-    QgsSQLStatementCollectTableNames() {}
+    QgsSQLStatementCollectTableNames() = default;
 
     void visit( const QgsSQLStatement::NodeColumnRef &n ) override;
     void visit( const QgsSQLStatement::NodeTableDef &n ) override;
diff --git a/src/core/qgsstacktrace.cpp b/src/core/qgsstacktrace.cpp
index 3bb99fa8061..dae74a7cb7a 100644
--- a/src/core/qgsstacktrace.cpp
+++ b/src/core/qgsstacktrace.cpp
@@ -161,11 +161,6 @@ QVector<QgsStackTrace::StackLine> QgsStackTrace::trace( unsigned int maxFrames )
 }
 #endif
 
-QgsStackTrace::QgsStackTrace()
-{
-
-}
-
 bool QgsStackTrace::StackLine::isQgisModule() const
 {
   return moduleName.contains( "qgis", Qt::CaseInsensitive );
diff --git a/src/core/qgsstacktrace.h b/src/core/qgsstacktrace.h
index e80a7699785..fde462a42ec 100644
--- a/src/core/qgsstacktrace.h
+++ b/src/core/qgsstacktrace.h
@@ -89,7 +89,7 @@ class CORE_EXPORT QgsStackTrace
 #endif
 
   private:
-    QgsStackTrace();
+    QgsStackTrace() = default;
     static QString mSymbolPaths;
 
 };
diff --git a/src/core/qgstracer.cpp b/src/core/qgstracer.cpp
index f269e97da5a..eff5038b14a 100644
--- a/src/core/qgstracer.cpp
+++ b/src/core/qgstracer.cpp
@@ -90,7 +90,7 @@ double closestSegment( const QgsPolyline &pl, const QgsPointXY &pt, int &vertexA
 //! Simple graph structure for shortest path search
 struct QgsTracerGraph
 {
-  QgsTracerGraph()  {}
+  QgsTracerGraph()  = default;
 
   struct E  // bidirectional edge
   {
diff --git a/src/core/qgstrackedvectorlayertools.cpp b/src/core/qgstrackedvectorlayertools.cpp
index f3e586a1285..4e52d288c1e 100644
--- a/src/core/qgstrackedvectorlayertools.cpp
+++ b/src/core/qgstrackedvectorlayertools.cpp
@@ -16,10 +16,6 @@
 #include "qgstrackedvectorlayertools.h"
 #include "qgsvectorlayer.h"
 
-QgsTrackedVectorLayerTools::QgsTrackedVectorLayerTools()
-
-{
-}
 
 bool QgsTrackedVectorLayerTools::addFeature( QgsVectorLayer *layer, const QgsAttributeMap &defaultValues, const QgsGeometry &defaultGeometry, QgsFeature *feature ) const
 {
diff --git a/src/core/qgstrackedvectorlayertools.h b/src/core/qgstrackedvectorlayertools.h
index 6b93a823bde..d716160bf22 100644
--- a/src/core/qgstrackedvectorlayertools.h
+++ b/src/core/qgstrackedvectorlayertools.h
@@ -26,7 +26,7 @@ class CORE_EXPORT QgsTrackedVectorLayerTools : public QgsVectorLayerTools
 {
     Q_OBJECT
   public:
-    QgsTrackedVectorLayerTools();
+    QgsTrackedVectorLayerTools() = default;
 
     bool addFeature( QgsVectorLayer *layer, const QgsAttributeMap &defaultValues, const QgsGeometry &defaultGeometry, QgsFeature *feature ) const override;
     bool startEditing( QgsVectorLayer *layer ) const override;
diff --git a/src/core/raster/qgsbilinearrasterresampler.cpp b/src/core/raster/qgsbilinearrasterresampler.cpp
index 16b9b332553..0bbf4ff38e2 100644
--- a/src/core/raster/qgsbilinearrasterresampler.cpp
+++ b/src/core/raster/qgsbilinearrasterresampler.cpp
@@ -19,10 +19,6 @@
 #include <QImage>
 #include <cmath>
 
-QgsBilinearRasterResampler::QgsBilinearRasterResampler()
-{
-}
-
 QgsBilinearRasterResampler *QgsBilinearRasterResampler::clone() const
 {
   return new QgsBilinearRasterResampler();
diff --git a/src/core/raster/qgsbilinearrasterresampler.h b/src/core/raster/qgsbilinearrasterresampler.h
index 0a0a039a2fb..661187cb9fb 100644
--- a/src/core/raster/qgsbilinearrasterresampler.h
+++ b/src/core/raster/qgsbilinearrasterresampler.h
@@ -30,7 +30,7 @@
 class CORE_EXPORT QgsBilinearRasterResampler: public QgsRasterResampler
 {
   public:
-    QgsBilinearRasterResampler();
+    QgsBilinearRasterResampler() = default;
 
     void resample( const QImage &srcImage, QImage &dstImage ) override;
     QString type() const override { return QStringLiteral( "bilinear" ); }
diff --git a/src/core/raster/qgsrasterpipe.cpp b/src/core/raster/qgsrasterpipe.cpp
index 7dbbe1ddb16..8cdd8cf2dfa 100644
--- a/src/core/raster/qgsrasterpipe.cpp
+++ b/src/core/raster/qgsrasterpipe.cpp
@@ -29,10 +29,6 @@
 #include "qgsrasterprojector.h"
 #include "qgsrasternuller.h"
 
-QgsRasterPipe::QgsRasterPipe()
-{
-}
-
 QgsRasterPipe::QgsRasterPipe( const QgsRasterPipe &pipe )
 {
   for ( int i = 0; i < pipe.size(); i++ )
diff --git a/src/core/raster/qgsrasterpipe.h b/src/core/raster/qgsrasterpipe.h
index 135c019d0ad..e6ac56728cd 100644
--- a/src/core/raster/qgsrasterpipe.h
+++ b/src/core/raster/qgsrasterpipe.h
@@ -58,7 +58,7 @@ class CORE_EXPORT QgsRasterPipe
       HueSaturationRole = 7
     };
 
-    QgsRasterPipe();
+    QgsRasterPipe() = default;
     QgsRasterPipe( const QgsRasterPipe &pipe ) SIP_SKIP;
 
     ~QgsRasterPipe();
diff --git a/src/core/raster/qgsrastertransparency.cpp b/src/core/raster/qgsrastertransparency.cpp
index c7be553cb56..6602fbdf06c 100644
--- a/src/core/raster/qgsrastertransparency.cpp
+++ b/src/core/raster/qgsrastertransparency.cpp
@@ -24,11 +24,6 @@ email                : ersts@amnh.org
 #include <QDomDocument>
 #include <QDomElement>
 
-QgsRasterTransparency::QgsRasterTransparency()
-{
-
-}
-
 /**
   Accessor for transparentSingleValuePixelList
 */
diff --git a/src/core/raster/qgsrastertransparency.h b/src/core/raster/qgsrastertransparency.h
index c2dca354fc9..2eb3d35b262 100644
--- a/src/core/raster/qgsrastertransparency.h
+++ b/src/core/raster/qgsrastertransparency.h
@@ -32,7 +32,7 @@ class CORE_EXPORT QgsRasterTransparency
 {
 
   public:
-    QgsRasterTransparency();
+    QgsRasterTransparency() = default;
 
     //
     // Structs to hold transparent pixel vlaues
diff --git a/src/core/symbology/qgscategorizedsymbolrenderer.cpp b/src/core/symbology/qgscategorizedsymbolrenderer.cpp
index 96ba594ef07..3a6b4547cd9 100644
--- a/src/core/symbology/qgscategorizedsymbolrenderer.cpp
+++ b/src/core/symbology/qgscategorizedsymbolrenderer.cpp
@@ -168,10 +168,6 @@ QgsCategorizedSymbolRenderer::QgsCategorizedSymbolRenderer( const QString &attrN
   }
 }
 
-QgsCategorizedSymbolRenderer::~QgsCategorizedSymbolRenderer()
-{
-}
-
 void QgsCategorizedSymbolRenderer::rebuildHash()
 {
   mSymbolHash.clear();
diff --git a/src/core/symbology/qgscategorizedsymbolrenderer.h b/src/core/symbology/qgscategorizedsymbolrenderer.h
index 6e833cf504c..3546978c605 100644
--- a/src/core/symbology/qgscategorizedsymbolrenderer.h
+++ b/src/core/symbology/qgscategorizedsymbolrenderer.h
@@ -79,7 +79,6 @@ class CORE_EXPORT QgsCategorizedSymbolRenderer : public QgsFeatureRenderer
   public:
 
     QgsCategorizedSymbolRenderer( const QString &attrName = QString(), const QgsCategoryList &categories = QgsCategoryList() );
-    ~QgsCategorizedSymbolRenderer();
 
     virtual QgsSymbol *symbolForFeature( QgsFeature &feature, QgsRenderContext &context ) override;
     virtual QgsSymbol *originalSymbolForFeature( QgsFeature &feature, QgsRenderContext &context ) override;
diff --git a/src/core/symbology/qgssinglesymbolrenderer.cpp b/src/core/symbology/qgssinglesymbolrenderer.cpp
index 865f31f8b3a..6c8f303bbde 100644
--- a/src/core/symbology/qgssinglesymbolrenderer.cpp
+++ b/src/core/symbology/qgssinglesymbolrenderer.cpp
@@ -40,10 +40,6 @@ QgsSingleSymbolRenderer::QgsSingleSymbolRenderer( QgsSymbol *symbol )
   Q_ASSERT( symbol );
 }
 
-QgsSingleSymbolRenderer::~QgsSingleSymbolRenderer()
-{
-}
-
 QgsSymbol *QgsSingleSymbolRenderer::symbolForFeature( QgsFeature &, QgsRenderContext & )
 {
   return mSymbol.get();
diff --git a/src/core/symbology/qgssinglesymbolrenderer.h b/src/core/symbology/qgssinglesymbolrenderer.h
index 891a2da60bc..17a56d5bcc4 100644
--- a/src/core/symbology/qgssinglesymbolrenderer.h
+++ b/src/core/symbology/qgssinglesymbolrenderer.h
@@ -31,7 +31,6 @@ class CORE_EXPORT QgsSingleSymbolRenderer : public QgsFeatureRenderer
   public:
 
     QgsSingleSymbolRenderer( QgsSymbol *symbol SIP_TRANSFER );
-    ~QgsSingleSymbolRenderer();
 
     virtual QgsSymbol *symbolForFeature( QgsFeature &feature, QgsRenderContext &context ) override;
     virtual QgsSymbol *originalSymbolForFeature( QgsFeature &feature, QgsRenderContext &context ) override;
diff --git a/src/gui/attributetable/qgsfeaturelistmodel.cpp b/src/gui/attributetable/qgsfeaturelistmodel.cpp
index a6f82614e43..84a68953523 100644
--- a/src/gui/attributetable/qgsfeaturelistmodel.cpp
+++ b/src/gui/attributetable/qgsfeaturelistmodel.cpp
@@ -29,10 +29,6 @@ QgsFeatureListModel::QgsFeatureListModel( QgsAttributeTableFilterModel *sourceMo
   setSourceModel( sourceModel );
 }
 
-QgsFeatureListModel::~QgsFeatureListModel()
-{
-}
-
 void QgsFeatureListModel::setSourceModel( QgsAttributeTableFilterModel *sourceModel )
 {
   QAbstractProxyModel::setSourceModel( sourceModel );
diff --git a/src/gui/attributetable/qgsfeaturelistmodel.h b/src/gui/attributetable/qgsfeaturelistmodel.h
index 2c23dd2ea8b..444d146bdb7 100644
--- a/src/gui/attributetable/qgsfeaturelistmodel.h
+++ b/src/gui/attributetable/qgsfeaturelistmodel.h
@@ -60,7 +60,6 @@ class GUI_EXPORT QgsFeatureListModel : public QAbstractProxyModel, public QgsFea
 
   public:
     explicit QgsFeatureListModel( QgsAttributeTableFilterModel *sourceModel, QObject *parent SIP_TRANSFERTHIS = 0 );
-    virtual ~QgsFeatureListModel();
 
     virtual void setSourceModel( QgsAttributeTableFilterModel *sourceModel );
     QgsVectorLayerCache *layerCache();
diff --git a/src/gui/attributetable/qgsfieldconditionalformatwidget.cpp b/src/gui/attributetable/qgsfieldconditionalformatwidget.cpp
index dff960be90e..97e709d50f2 100644
--- a/src/gui/attributetable/qgsfieldconditionalformatwidget.cpp
+++ b/src/gui/attributetable/qgsfieldconditionalformatwidget.cpp
@@ -52,10 +52,6 @@ QgsFieldConditionalFormatWidget::QgsFieldConditionalFormatWidget( QWidget *paren
   setPresets( defaultPresets() );
 }
 
-QgsFieldConditionalFormatWidget::~QgsFieldConditionalFormatWidget()
-{
-}
-
 void QgsFieldConditionalFormatWidget::setExpression()
 {
   QgsExpressionContext context( QgsExpressionContextUtils::globalProjectLayerScopes( mLayer ) );
diff --git a/src/gui/attributetable/qgsfieldconditionalformatwidget.h b/src/gui/attributetable/qgsfieldconditionalformatwidget.h
index 26794335a24..2789a3019b9 100644
--- a/src/gui/attributetable/qgsfieldconditionalformatwidget.h
+++ b/src/gui/attributetable/qgsfieldconditionalformatwidget.h
@@ -42,8 +42,6 @@ class GUI_EXPORT QgsFieldConditionalFormatWidget : public QWidget, private Ui::Q
      */
     explicit QgsFieldConditionalFormatWidget( QWidget *parent SIP_TRANSFERTHIS = 0 );
 
-    ~QgsFieldConditionalFormatWidget();
-
     /** Switches the widget to the rules page.
      */
     void viewRules();
diff --git a/src/gui/editorwidgets/core/qgseditorwidgetregistry.cpp b/src/gui/editorwidgets/core/qgseditorwidgetregistry.cpp
index fc33892196f..77df0d84f06 100644
--- a/src/gui/editorwidgets/core/qgseditorwidgetregistry.cpp
+++ b/src/gui/editorwidgets/core/qgseditorwidgetregistry.cpp
@@ -60,10 +60,6 @@ void QgsEditorWidgetRegistry::initEditors( QgsMapCanvas *mapCanvas, QgsMessageBa
   registerWidget( QStringLiteral( "List" ), new QgsListWidgetFactory( tr( "List" ) ) );
 }
 
-QgsEditorWidgetRegistry::QgsEditorWidgetRegistry()
-{
-}
-
 QgsEditorWidgetRegistry::~QgsEditorWidgetRegistry()
 {
   qDeleteAll( mWidgetFactories );
diff --git a/src/gui/editorwidgets/core/qgseditorwidgetregistry.h b/src/gui/editorwidgets/core/qgseditorwidgetregistry.h
index 68d716865b5..d8863006c88 100644
--- a/src/gui/editorwidgets/core/qgseditorwidgetregistry.h
+++ b/src/gui/editorwidgets/core/qgseditorwidgetregistry.h
@@ -51,7 +51,7 @@ class GUI_EXPORT QgsEditorWidgetRegistry : public QObject
      * Constructor for QgsEditorWidgetRegistry. QgsEditorWidgetRegistry is not usually directly created, but rather accessed through
      * QgsGui::editorWidgetRegistry().
      */
-    QgsEditorWidgetRegistry();
+    QgsEditorWidgetRegistry() = default;
 
     /**
      * Registers all the default widgets.
diff --git a/src/gui/qgisinterface.cpp b/src/gui/qgisinterface.cpp
index afa767126f2..5e8f9895b44 100644
--- a/src/gui/qgisinterface.cpp
+++ b/src/gui/qgisinterface.cpp
@@ -17,9 +17,3 @@
  ****************************************************************************/
 
 #include "qgisinterface.h"
-
-QgisInterface::QgisInterface()
-{
-
-
-}
diff --git a/src/gui/qgisinterface.h b/src/gui/qgisinterface.h
index 8be12cb54aa..171cb5f68cc 100644
--- a/src/gui/qgisinterface.h
+++ b/src/gui/qgisinterface.h
@@ -77,7 +77,7 @@ class GUI_EXPORT QgisInterface : public QObject
   public:
 
     //! Constructor
-    QgisInterface();
+    QgisInterface() = default;
 
     virtual QgsPluginManagerInterface *pluginManagerInterface() = 0;
 
diff --git a/src/gui/qgsmapcanvas.cpp b/src/gui/qgsmapcanvas.cpp
index 32e2d2e676f..119fc201b6a 100644
--- a/src/gui/qgsmapcanvas.cpp
+++ b/src/gui/qgsmapcanvas.cpp
@@ -76,9 +76,7 @@ email                : sherman at mrcc.com
 class QgsMapCanvas::CanvasProperties
 {
   public:
-    CanvasProperties()
-
-    { }
+    CanvasProperties() = default;
 
     //!Flag to indicate status of mouse button
     bool mouseButtonDown{ false };
diff --git a/src/gui/qgspluginmanagerinterface.cpp b/src/gui/qgspluginmanagerinterface.cpp
index df4c9146eed..88f5c44a543 100644
--- a/src/gui/qgspluginmanagerinterface.cpp
+++ b/src/gui/qgspluginmanagerinterface.cpp
@@ -15,7 +15,3 @@
  ***************************************************************************/
 
 #include "qgspluginmanagerinterface.h"
-
-QgsPluginManagerInterface::QgsPluginManagerInterface()
-{
-}
diff --git a/src/gui/qgspluginmanagerinterface.h b/src/gui/qgspluginmanagerinterface.h
index 6724060f908..bc5ecfbc276 100644
--- a/src/gui/qgspluginmanagerinterface.h
+++ b/src/gui/qgspluginmanagerinterface.h
@@ -33,7 +33,7 @@ class GUI_EXPORT QgsPluginManagerInterface : public QObject
   public:
 
     //! Constructor
-    QgsPluginManagerInterface();
+    QgsPluginManagerInterface() = default;
 
     //! remove Python plugins from the metadata registry (c++ plugins stay)
     virtual void clearPythonPluginMetadata() = 0;
diff --git a/src/gui/symbology/qgssvgselectorwidget.cpp b/src/gui/symbology/qgssvgselectorwidget.cpp
index 8ced3b98714..63b256ff375 100644
--- a/src/gui/symbology/qgssvgselectorwidget.cpp
+++ b/src/gui/symbology/qgssvgselectorwidget.cpp
@@ -389,10 +389,6 @@ QgsSvgSelectorWidget::QgsSvgSelectorWidget( QWidget *parent )
            this, &QgsSvgSelectorWidget::populateIcons );
 }
 
-QgsSvgSelectorWidget::~QgsSvgSelectorWidget()
-{
-}
-
 void QgsSvgSelectorWidget::setSvgPath( const QString &svgPath )
 {
   mCurrentSvgPath = svgPath;
diff --git a/src/gui/symbology/qgssvgselectorwidget.h b/src/gui/symbology/qgssvgselectorwidget.h
index 065cb9c50c0..7e3b233a9c3 100644
--- a/src/gui/symbology/qgssvgselectorwidget.h
+++ b/src/gui/symbology/qgssvgselectorwidget.h
@@ -239,7 +239,6 @@ class GUI_EXPORT QgsSvgSelectorWidget : public QWidget, private Ui::WidgetSvgSel
 
   public:
     QgsSvgSelectorWidget( QWidget *parent SIP_TRANSFERTHIS = 0 );
-    ~QgsSvgSelectorWidget();
 
     QString currentSvgPath() const;
 
diff --git a/src/gui/symbology/qgssymbolwidgetcontext.cpp b/src/gui/symbology/qgssymbolwidgetcontext.cpp
index 43e4df3213d..72f444544c3 100644
--- a/src/gui/symbology/qgssymbolwidgetcontext.cpp
+++ b/src/gui/symbology/qgssymbolwidgetcontext.cpp
@@ -16,10 +16,6 @@
 #include "qgsmapcanvas.h"
 #include "qgsproject.h"
 
-QgsSymbolWidgetContext::QgsSymbolWidgetContext()
-
-{}
-
 QgsSymbolWidgetContext::QgsSymbolWidgetContext( const QgsSymbolWidgetContext &other )
   : mMapCanvas( other.mMapCanvas )
   , mAdditionalScopes( other.mAdditionalScopes )
diff --git a/src/gui/symbology/qgssymbolwidgetcontext.h b/src/gui/symbology/qgssymbolwidgetcontext.h
index a8244d92ee5..c3e69da0202 100644
--- a/src/gui/symbology/qgssymbolwidgetcontext.h
+++ b/src/gui/symbology/qgssymbolwidgetcontext.h
@@ -35,7 +35,7 @@ class GUI_EXPORT QgsSymbolWidgetContext // clazy:exclude=rule-of-three
 {
   public:
 
-    QgsSymbolWidgetContext();
+    QgsSymbolWidgetContext() = default;
 
     /** Copy constructor.
      * \param other source QgsSymbolWidgetContext
diff --git a/src/providers/gdal/qgsgdalsourceselect.cpp b/src/providers/gdal/qgsgdalsourceselect.cpp
index ff61dbcd856..6e0f9478df7 100644
--- a/src/providers/gdal/qgsgdalsourceselect.cpp
+++ b/src/providers/gdal/qgsgdalsourceselect.cpp
@@ -33,11 +33,6 @@ QgsGdalSourceSelect::QgsGdalSourceSelect( QWidget *parent, Qt::WindowFlags fl, Q
   } );
 }
 
-QgsGdalSourceSelect::~QgsGdalSourceSelect()
-{
-
-}
-
 void QgsGdalSourceSelect::addButtonClicked()
 {
   Q_FOREACH ( const QString &path, QgsFileWidget::splitFilePaths( mRasterPath ) )
diff --git a/src/providers/gdal/qgsgdalsourceselect.h b/src/providers/gdal/qgsgdalsourceselect.h
index 52544606b13..0ed51537078 100644
--- a/src/providers/gdal/qgsgdalsourceselect.h
+++ b/src/providers/gdal/qgsgdalsourceselect.h
@@ -32,8 +32,6 @@ class QgsGdalSourceSelect : public QgsAbstractDataSourceWidget, private Ui::QgsG
     //! Constructor
     QgsGdalSourceSelect( QWidget *parent = nullptr, Qt::WindowFlags fl = QgsGuiUtils::ModalDialogFlags, QgsProviderRegistry::WidgetMode widgetMode = QgsProviderRegistry::WidgetMode::None );
 
-    ~QgsGdalSourceSelect();
-
   public slots:
     //! Determines the tables the user selected and closes the dialog
     void addButtonClicked() override;
diff --git a/src/providers/ogr/qgsgeopackagedataitems.cpp b/src/providers/ogr/qgsgeopackagedataitems.cpp
index 527bbd63685..d4846cdba2e 100644
--- a/src/providers/ogr/qgsgeopackagedataitems.cpp
+++ b/src/providers/ogr/qgsgeopackagedataitems.cpp
@@ -54,11 +54,6 @@ QgsGeoPackageRootItem::QgsGeoPackageRootItem( QgsDataItem *parent, QString name,
   populate();
 }
 
-QgsGeoPackageRootItem::~QgsGeoPackageRootItem()
-{
-
-}
-
 QVector<QgsDataItem *> QgsGeoPackageRootItem::createChildren()
 {
   QVector<QgsDataItem *> connections;
diff --git a/src/providers/ogr/qgsgeopackagedataitems.h b/src/providers/ogr/qgsgeopackagedataitems.h
index 4e3e54472ee..78011c0d1ab 100644
--- a/src/providers/ogr/qgsgeopackagedataitems.h
+++ b/src/providers/ogr/qgsgeopackagedataitems.h
@@ -103,7 +103,6 @@ class QgsGeoPackageRootItem : public QgsDataCollectionItem
 
   public:
     QgsGeoPackageRootItem( QgsDataItem *parent, QString name, QString path );
-    ~QgsGeoPackageRootItem();
 
     QVector<QgsDataItem *> createChildren() override;
 
diff --git a/src/providers/postgres/qgspgnewconnection.cpp b/src/providers/postgres/qgspgnewconnection.cpp
index 42e9c8fae6d..cda59980458 100644
--- a/src/providers/postgres/qgspgnewconnection.cpp
+++ b/src/providers/postgres/qgspgnewconnection.cpp
@@ -106,11 +106,6 @@ QgsPgNewConnection::QgsPgNewConnection( QWidget *parent, const QString &connName
   txtName->setValidator( new QRegExpValidator( QRegExp( "[^\\/]*" ), txtName ) );
 }
 
-QgsPgNewConnection::~QgsPgNewConnection()
-{
-
-}
-
 //! Autoconnected SLOTS *
 void QgsPgNewConnection::accept()
 {
@@ -224,4 +219,4 @@ void QgsPgNewConnection::testConnection()
 void QgsPgNewConnection::showHelp()
 {
   QgsHelp::openHelp( QStringLiteral( "managing_data_source/opening_data.html#creating-a-stored-connection" ) );
-}
\ No newline at end of file
+}
diff --git a/src/providers/postgres/qgspgnewconnection.h b/src/providers/postgres/qgspgnewconnection.h
index 7a894bec777..d6930f3975b 100644
--- a/src/providers/postgres/qgspgnewconnection.h
+++ b/src/providers/postgres/qgspgnewconnection.h
@@ -32,8 +32,6 @@ class QgsPgNewConnection : public QDialog, private Ui::QgsPgNewConnectionBase
     //! Constructor
     QgsPgNewConnection( QWidget *parent = nullptr, const QString &connName = QString(), Qt::WindowFlags fl = QgsGuiUtils::ModalDialogFlags );
 
-    ~QgsPgNewConnection();
-
     //! Tests the connection using the parameters supplied
     void testConnection();
   public slots: