memcg: __mem_cgroup_free: remove stale disarm_static_keys comment

cpuset code stopped using cgroup_lock in favor of cpuset_mutex long ago.
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/memcontrol.c

@@ -4724,17 +4724,6 @@ static void __mem_cgroup_free(struct mem_cgroup *memcg)
 
 	free_percpu(memcg->stat);
 
-	/*
-	 * We need to make sure that (at least for now), the jump label
-	 * destruction code runs outside of the cgroup lock. This is because
-	 * get_online_cpus(), which is called from the static_branch update,
-	 * can't be called inside the cgroup_lock. cpusets are the ones
-	 * enforcing this dependency, so if they ever change, we might as well.
-	 *
-	 * schedule_work() will guarantee this happens. Be careful if you need
-	 * to move this code around, and make sure it is outside
-	 * the cgroup_lock.
-	 */
 	disarm_static_keys(memcg);
 	kfree(memcg);
 }