Removed unnecessary dispose()

core/src/mindustry/ui/fragments/MenuFragment.java

@@ -24,12 +24,6 @@ public class MenuFragment extends Fragment{
     private Button currentMenu;
     private MenuRenderer renderer;
 
-    public MenuFragment(){
-        Events.on(DisposeEvent.class, event -> {
-            renderer.dispose();
-        });
-    }
-
     @Override
     public void build(Group parent){
         renderer = new MenuRenderer();