diff --git a/src/app/qgslabelingwidget.h b/src/app/qgslabelingwidget.h
index b530026b503..7d3e42e971b 100644
--- a/src/app/qgslabelingwidget.h
+++ b/src/app/qgslabelingwidget.h
@@ -51,9 +51,6 @@ class QgsLabelingWidget : public QgsMapLayerConfigWidget, private Ui::QgsLabelin
 
     void resetSettings();
 
-  signals:
-    void widgetChanged();
-
   protected slots:
     void labelModeChanged( int index );
     void showEngineConfigDialog();
diff --git a/src/app/qgsmaptoolidentifyaction.h b/src/app/qgsmaptoolidentifyaction.h
index 35196de937d..018553ad26d 100644
--- a/src/app/qgsmaptoolidentifyaction.h
+++ b/src/app/qgsmaptoolidentifyaction.h
@@ -64,8 +64,7 @@ class APP_EXPORT QgsMapToolIdentifyAction : public QgsMapToolIdentify
     void handleChangedRasterResults( QList<IdentifyResult> &results );
 
   signals:
-    void identifyProgress( int, int );
-    void identifyMessage( const QString & );
+
     void copyToClipboard( QgsFeatureStore & );
 
   private slots:
diff --git a/src/app/qgsrulebasedlabelingwidget.h b/src/app/qgsrulebasedlabelingwidget.h
index 12f7c44dc43..95211d13a32 100644
--- a/src/app/qgsrulebasedlabelingwidget.h
+++ b/src/app/qgsrulebasedlabelingwidget.h
@@ -88,9 +88,6 @@ class QgsRuleBasedLabelingWidget : public QgsPanelWidget, private Ui::QgsRuleBas
     //! Gives access to the internal root of the rule tree
     const QgsRuleBasedLabeling::Rule *rootRule() const { return mRootRule; }
 
-  signals:
-    void widgetChanged();
-
   protected slots:
     void addRule();
     void editRule();
@@ -144,9 +141,6 @@ class APP_EXPORT QgsLabelingRulePropsWidget : public QgsPanelWidget, private Ui:
 
     virtual void setDockMode( bool dockMode ) override;
 
-  signals:
-    void widgetChanged();
-
   public slots:
     void testFilter();
     void buildExpression();
diff --git a/src/providers/postgres/qgspgsourceselect.h b/src/providers/postgres/qgspgsourceselect.h
index eb165a38b6b..5033475981a 100644
--- a/src/providers/postgres/qgspgsourceselect.h
+++ b/src/providers/postgres/qgspgsourceselect.h
@@ -79,7 +79,6 @@ class QgsPgSourceSelect : public QgsAbstractDataSourceWidget, private Ui::QgsDbS
 
   signals:
     void addGeometryColumn( const QgsPostgresLayerProperty & );
-    void progress( int, int );
     void progressMessage( const QString & );
 
   public slots:
diff --git a/src/providers/postgres/qgspostgresprovider.h b/src/providers/postgres/qgspostgresprovider.h
index 7a586e8e438..ae06dcb945f 100644
--- a/src/providers/postgres/qgspostgresprovider.h
+++ b/src/providers/postgres/qgspostgresprovider.h
@@ -219,13 +219,6 @@ class QgsPostgresProvider : public QgsVectorDataProvider
 
   signals:
 
-    /**
-     *   This is emitted whenever the worker thread has fully calculated the
-     *   PostGIS extents for this layer, and its event has been received by this
-     *   provider.
-     */
-    void fullExtentCalculated();
-
     /**
      *   This is emitted when this provider is satisfied that all objects
      *   have had a chance to adjust themselves after they'd been notified that
diff --git a/src/providers/spatialite/qgsspatialiteprovider.h b/src/providers/spatialite/qgsspatialiteprovider.h
index f9bc2e060af..a0c95084606 100644
--- a/src/providers/spatialite/qgsspatialiteprovider.h
+++ b/src/providers/spatialite/qgsspatialiteprovider.h
@@ -175,13 +175,6 @@ class QgsSpatiaLiteProvider: public QgsVectorDataProvider
 
   signals:
 
-    /**
-     *   This is emitted whenever the worker thread has fully calculated the
-     *   extents for this layer, and its event has been received by this
-     *   provider.
-     */
-    void fullExtentCalculated();
-
     /**
      *   This is emitted when this provider is satisfied that all objects
      *   have had a chance to adjust themselves after they'd been notified that
diff --git a/src/providers/wcs/qgswcsprovider.h b/src/providers/wcs/qgswcsprovider.h
index 2b314145097..6fd2a10e5b8 100644
--- a/src/providers/wcs/qgswcsprovider.h
+++ b/src/providers/wcs/qgswcsprovider.h
@@ -191,11 +191,6 @@ class QgsWcsProvider : public QgsRasterDataProvider, QgsGdalProviderBase
      */
     static bool parseServiceExceptionReportDom( QByteArray const &xml, const QString &wcsVersion, QString &errorTitle, QString &errorText );
 
-
-  signals:
-
-    void dataChanged();
-
   private:
     // case insensitive attribute value lookup
     static QString nodeAttribute( const QDomElement &e, const QString &name, const QString &defValue = QString() );
diff --git a/src/providers/wcs/qgswcssourceselect.h b/src/providers/wcs/qgswcssourceselect.h
index 35da8bfdfff..c098ecbd622 100644
--- a/src/providers/wcs/qgswcssourceselect.h
+++ b/src/providers/wcs/qgswcssourceselect.h
@@ -58,13 +58,6 @@ class QgsWCSSourceSelect : public QgsOWSSourceSelect
 
     ~QgsWCSSourceSelect();
 
-  public slots:
-
-  signals:
-    void addRasterLayer( QString const &rasterLayerPath,
-                         QString const &baseName,
-                         QString const &providerKey );
-
   private:
     QgsWcsCapabilities mCapabilities;
 
diff --git a/src/providers/wms/qgswmsprovider.h b/src/providers/wms/qgswmsprovider.h
index e44351b67bf..0830bcce047 100644
--- a/src/providers/wms/qgswmsprovider.h
+++ b/src/providers/wms/qgswmsprovider.h
@@ -253,10 +253,6 @@ class QgsWmsProvider : public QgsRasterDataProvider
     } TilePosition;
     typedef QList<TilePosition> TilePositions;
 
-  signals:
-
-    void dataChanged();
-
   private slots:
     void identifyReplyFinished();
     void getLegendGraphicReplyFinished( const QImage & );