Remove unnecessary checks of wxEvent::GetSkipped()

HandleWindowEvent() already returns false if the event handler skipped
the event, there is no need to test for it explicitly.

No real changes.

src/osx/cocoa/window.mm

@@ -3712,7 +3712,7 @@ bool wxWidgetCocoaImpl::DoHandleKeyNavigation(const wxKeyEvent &event)
                     /* CTRL-TAB changes the (parent) window, i.e. switch notebook page */
                     new_event.SetWindowChange( event.ControlDown() );
                     new_event.SetCurrentFocus( focus );
-                    handled = iter->HandleWindowEvent( new_event ) && !new_event.GetSkipped();
+                    handled = iter->HandleWindowEvent( new_event );
                 }
 
                 iter = iter->GetParent() ;

src/osx/window_osx.cpp

@@ -2605,11 +2605,7 @@ bool wxWindowMac::OSXHandleKeyEvent( wxKeyEvent& event )
 #endif // wxUSE_ACCEL
 
     if ( !handled )
-    {
         handled = HandleWindowEvent( event ) ;
-        if ( handled && event.GetSkipped() )
-            handled = false ;
-    }
 
     return handled ;
 }