Remove not implemented method

src/kmmainwidget.h

@@ -517,7 +517,6 @@ private:
     void slotRestartAccount();
     void slotAccountSettings();
     void updateDisplayFormatMessage();
-    void slotContactHtmlPreferencesUpdated(const Akonadi::Item &contact, Akonadi::Item::Id id, bool showAsHTML, bool remoteContent);
 
     // Message actions
     QAction *mDeleteAction = nullptr;

src/messageactions.h

@@ -89,7 +89,6 @@ public:
     QAction *editAsNewAction() const;
 
     QAction *exportToPdfAction() const;
-    void setExportToPdfAction(QAction *exportToPdfAction);
 
     void fillAkonadiStandardAction(Akonadi::StandardMailActionManager *akonadiStandardActionManager);
     Q_REQUIRED_RESULT Akonadi::Item currentItem() const;