Remove unused modelInvalid

Change-Id: I18701b367dcca36afb8e6f28645453294881683f

chart2/source/controller/sidebar/ChartElementsPanel.cxx

@@ -103,9 +103,7 @@ void ChartSidebarModifyListener::modified(const css::lang::EventObject& /*rEvent
 
 void ChartSidebarModifyListener::disposing(const css::lang::EventObject& /*rEvent*/)
         throw (::css::uno::RuntimeException, ::std::exception)
-{
-    mpParent->modelInvalid();
-}
+{}
 
 ChartModel* getChartModel(css::uno::Reference<css::frame::XModel> xModel)
 {
@@ -488,11 +486,6 @@ void ChartElementsPanel::NotifyItemUpdate(
 {
 }
 
-void ChartElementsPanel::modelInvalid()
-{
-
-}
-
 IMPL_LINK(ChartElementsPanel, CheckBoxHdl, CheckBox*, pCheckBox)
 {
     bool bChecked = pCheckBox->IsChecked();

chart2/source/controller/sidebar/ChartElementsPanel.hxx

@@ -68,7 +68,6 @@ public:
     virtual void dispose() SAL_OVERRIDE;
 
     void updateData();
-    void modelInvalid();
 
 private:
     //ui controls