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

Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 9f8ad77..1b44ad6 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -821,7 +821,6 @@
 		return;
 	VM_BUG_ON(list_empty(&pc->lru));
 	list_del_init(&pc->lru);
-	return;
 }
 
 void mem_cgroup_del_lru(struct page *page)