memcg: remove unnecessary return from void-returning mem_cgroup_del_lru_list()

Signed-off-by: Minchan Kim <[e-mail]>
Acked-by: Balbir Singh <[e-mail]>
Acked-by: KAMEZAWA Hiroyuki <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

mm/memcontrol.c

···
 		return;
 	VM_BUG_ON(list_empty(&pc->lru));
 	list_del_init(&pc->lru);
-	return;
 }
 
 void mem_cgroup_del_lru(struct page *page)