removed all compile- and run-time checks for GTK+ < 2.4; don't include the generic files which are now never used in wxGTK in the build

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@49660 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/menu.cpp

@@ -1695,8 +1695,6 @@ bool wxWindowGTK::DoPopupMenu( wxMenu *menu, int x, int y )
 
 #endif // wxUSE_MENUS_NATIVE
 
-#ifdef __WXGTK20__
-
 #include <gtk/gtk.h>
 
 const char *wxGetStockGtkID(wxWindowID id)
@@ -1815,6 +1813,4 @@ bool wxGetStockGtkAccelerator(const char *id, GdkModifierType *mod, guint *key)
     return false;
 }
 
-#endif // __WXGTK20__
-
 #endif // wxUSE_MENUS