removed obsolete wxUSE_CTL3D

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@31368 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/dialog.cpp

@@ -429,12 +429,8 @@ void wxDialog::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 
 void wxDialog::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
 {
-#if wxUSE_CTL3D
-    Ctl3dColorChange();
-#else
     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
     Refresh();
-#endif
 }
 
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