call RemoveChild() in ~wxWindowBase instead of doing it in each ~wxWindow for each port

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@23596 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mgl/window.cpp

@@ -591,14 +591,8 @@ wxWindowMGL::~wxWindowMGL()
     if ( gs_windowUnderMouse == this )
         gs_windowUnderMouse = NULL;
 
-    // VS: destroy children first and _then_ detach *this from its parent.
-    //     If we'd do it the other way around, children wouldn't be able
-    //     find their parent frame (see above).
     DestroyChildren();
 
-    if ( m_parent )
-        m_parent->RemoveChild(this);
-
     if ( m_wnd )
         MGL_wmDestroyWindow(m_wnd);
 }