GTK+ paints during idle time, it doesn't need help with that

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40859 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/window.cpp

@@ -2903,9 +2903,6 @@ void wxWindowGTK::OnInternalIdle()
         m_needsStyleChange = false;
     }
     
-    // Update invalidated regions.
-    GtkUpdate();
-
     wxCursor cursor = m_cursor;
     if (g_globalCursor.Ok()) cursor = g_globalCursor;