diff --git a/src/gui/vector/qgsvectorlayerproperties.h b/src/gui/vector/qgsvectorlayerproperties.h
index 44b68affdce..9a6830bd29c 100644
--- a/src/gui/vector/qgsvectorlayerproperties.h
+++ b/src/gui/vector/qgsvectorlayerproperties.h
@@ -35,7 +35,6 @@
 class QgsMapLayer;
 
 class QgsAttributeActionDialog;
-class QgsApplyDialog;
 class QgsVectorLayer;
 class QgsLabelingWidget;
 class QgsDiagramProperties;
diff --git a/src/plugins/qgsapplydialog.h b/src/plugins/qgsapplydialog.h
deleted file mode 100644
index 9eb3bc5085f..00000000000
--- a/src/plugins/qgsapplydialog.h
+++ /dev/null
@@ -1,43 +0,0 @@
-/***************************************************************************
-                         qgsapplydialog.h  -  description
-                         --------------------------------
-    begin                : November 2008
-    copyright            : (C) 2008 by Marco Hugentobler
-    email                : marco dot hugentobler at karto dot baug dot ethz dot ch
- ***************************************************************************/
-
-/***************************************************************************
- *                                                                         *
- *   This program is free software; you can redistribute it and/or modify  *
- *   it under the terms of the GNU General Public License as published by  *
- *   the Free Software Foundation; either version 2 of the License, or     *
- *   (at your option) any later version.                                   *
- *                                                                         *
- ***************************************************************************/
-#ifndef QGSAPPLYDIALOG_H
-#define QGSAPPLYDIALOG_H
-
-#include <QDialog>
-
-/**
- * \ingroup plugins
- * \brief Interface class for dialogs that have an apply operation (e.g. for symbology)
- * \note not available in Python bindings
-*/
-class QgsApplyDialog: public QDialog
-{
-    Q_OBJECT
-
-  public:
-
-    //! Constructor for QgsApplyDialog
-    QgsApplyDialog() = default;
-
-    /**
-     * This method is called when changes should be applied.
-     * It needs to be implemented by subclasses.
-     */
-    virtual void apply() const = 0;
-};
-
-#endif
diff --git a/tests/code_layout/acceptable_missing_doc.py b/tests/code_layout/acceptable_missing_doc.py
index 008acf7136e..7965d821448 100644
--- a/tests/code_layout/acceptable_missing_doc.py
+++ b/tests/code_layout/acceptable_missing_doc.py
@@ -993,7 +993,6 @@ ACCEPTABLE_MISSING_ADDED_NOTE = [
     'QgsRuggednessFilter',
     'QgsDialog',
     'QgsExpression',
-    'QgsApplyDialog',
     'QgsGraduatedSymbolRenderer',
     'QgsColorWidgetWrapper',
     'QgsExpressionNodeCondition',