content clipping becomes a runtime attribute

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@33210 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/laywin.h

@@ -184,10 +184,6 @@ public:
     // Called by layout algorithm to retrieve information about the window.
     void OnQueryLayoutInfo(wxQueryLayoutInfoEvent& event);
 
-#ifdef __WXMAC__
-    virtual bool MacClipChildren() const { return true ; }
-#endif
-
 private:
     void Init();