Remove unnecessary base class OnPaint() call from wxGenericColourDialog.

Events should be skipped instead of calling the base class event handler
directly, but in this case even this is not needed as wxGenericColourDialog
takes care of processing the event completely.

Closes #14405.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71788 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/colrdlgg.cpp

@@ -200,14 +200,8 @@ void wxGenericColourDialog::OnMouseEvent(wxMouseEvent& event)
       event.Skip();
 }
 
-void wxGenericColourDialog::OnPaint(wxPaintEvent& event)
+void wxGenericColourDialog::OnPaint(wxPaintEvent& WXUNUSED(event))
 {
-#if !defined(__WXMOTIF__) && !defined(__WXPM__) && !defined(__WXCOCOA__) && !defined(__WXOSX__)
-    wxDialog::OnPaint(event);
-#else
-    wxUnusedVar(event);
-#endif
-
     wxPaintDC dc(this);
 
     PaintBasicColours(dc);