sched: remove stale comment from sched_group_set_shares()

remove stale comment from sched_group_set_shares().

Function never returns -EINVAL.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/sched.c b/kernel/sched.c
index 7ef66bd..fc61b1f 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -6822,8 +6822,6 @@
 	if (tg->shares == shares)
 		goto done;
 
-	/* return -EINVAL if the new value is not sane */
-
 	tg->shares = shares;
 	for_each_possible_cpu(i)
 		set_se_shares(tg->se[i], shares);