[Android] Remove an unnecessary method override from GameListActivity…

….java. We don't actually do anything different from the default behavior of this method, so we don't need to explicitly define it.

This method is intended to be used for modifying the contents of a menu before displaying it. We don't really have a need for this, since it doesn't need to be modified.

Source/Android/src/org/dolphinemu/dolphinemu/gamelist/GameListActivity.java

@@ -191,13 +191,6 @@ public void onConfigurationChanged(Configuration newConfig)
 		mDrawerToggle.onConfigurationChanged(newConfig);
 	}
 
-	/* Called whenever we call invalidateOptionsMenu() */
-	@Override
-	public boolean onPrepareOptionsMenu(Menu menu)
-	{
-		return super.onPrepareOptionsMenu(menu);
-	}
-
 	@Override
 	public boolean onCreateOptionsMenu(Menu menu)
 	{