Revert "macosx: remove callbacks in VLCMain correctly. Fixes #5427"

This reverts commit f2dfc28e.

modules/gui/macosx/intf.m

@@ -1443,10 +1443,7 @@ unsigned int CocoaKeyToVLC( unichar i_key )
         else
         {
             if (state == END_S)
-            {
-                var_DelCallback( p_input, "intf-event", InputEvent, [VLCMain sharedInstance] );
                 [o_mainmenu setSubmenusEnabled: FALSE];
-            }
             [[self mainMenu] setPlay];
             [o_mainwindow setPlay];
         }