linking fix (removed unused virtual methods declarations)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@23707 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/x11/app.h

@@ -49,11 +49,7 @@ public:
     // override base class (pure) virtuals
     // -----------------------------------
 
-    virtual int MainLoop();
-    virtual void ExitMainLoop();
     virtual bool Initialized();
-    virtual bool Pending();
-    virtual bool Dispatch();
 
     virtual void Exit();