sched/fair: Remove stale power aware scheduling comments

Commit 8e7fbcbc ("sched: Remove stale power aware scheduling remnants
and dysfunctional knobs") deleted the power aware scheduling support.

This patch gets rid of the remaining power aware scheduling related
comments in the code as well.
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Morten Rasmussen <morten.rasmussen@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1461958364-675-2-git-send-email-dietmar.eggemann@arm.comSigned-off-by: Ingo Molnar <mingo@kernel.org>

kernel/sched/fair.c

@@ -7027,9 +7027,8 @@ static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *s
 	 * We're trying to get all the cpus to the average_load, so we don't
 	 * want to push ourselves above the average load, nor do we wish to
 	 * reduce the max loaded cpu below the average load. At the same time,
-	 * we also don't want to reduce the group load below the group capacity
-	 * (so that we can implement power-savings policies etc). Thus we look
-	 * for the minimum possible imbalance.
+	 * we also don't want to reduce the group load below the group
+	 * capacity. Thus we look for the minimum possible imbalance.
 	 */
 	max_pull = min(busiest->avg_load - sds->avg_load, load_above_capacity);
 
@@ -7053,10 +7052,7 @@ static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *s
 
 /**
  * find_busiest_group - Returns the busiest group within the sched_domain
- * if there is an imbalance. If there isn't an imbalance, and
- * the user has opted for power-savings, it returns a group whose
- * CPUs can be put to idle by rebalancing those tasks elsewhere, if
- * such a group exists.
+ * if there is an imbalance.
  *
  * Also calculates the amount of weighted load which should be moved
  * to restore balance.
@@ -7064,9 +7060,6 @@ static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *s
  * @env: The load balancing environment.
  *
  * Return:	- The busiest group if imbalance exists.
- *		- If no imbalance and user has opted for power-savings balance,
- *		   return the least loaded group whose CPUs can be
- *		   put to idle by rebalancing its tasks onto our group.
  */
 static struct sched_group *find_busiest_group(struct lb_env *env)
 {