Removed specialized signal that is now in the base class

src/providers/virtual/qgsvirtuallayersourceselect.h

@@ -53,9 +53,6 @@ class QgsVirtualLayerSourceSelect : public QgsAbstractDataSourceWidget, private
     void onTableRowChanged( const QModelIndex &current, const QModelIndex &previous );
     void updateLayersList();
 
-  signals:
-    //! Old_id, source, name, provider
-    void replaceVectorLayer( QString, QString, QString, QString );
 
   private:
     QgsVirtualLayerDefinition getVirtualLayerDef();