made wxTLW::SetIcon() non-virtual, it was already implemented in terms of

SetIcons() in most of the ports, now do it in all of them


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45322 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk1/mdi.h

@@ -155,8 +155,6 @@ public:
 #endif // wxUSE_TOOLBAR
 
     // no icon
-    virtual void SetIcon(const wxIcon& icon)
-        { wxTopLevelWindowBase::SetIcon(icon); }
     virtual void SetIcons(const wxIconBundle& icons )
         { wxTopLevelWindowBase::SetIcons(icons); }