sched: remove precise CPU load

CPU load calculations are statistical anyway, and there's little benefit
from having it calculated on every scheduling event. So remove this code,
it gets rid of a divide from the scheduler wakeup and context-switch
fastpath.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Mike Galbraith <efault@gmx.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>

kernel/sched_debug.c

@@ -145,8 +145,6 @@ static void print_cpu(struct seq_file *m, int cpu)
 	P(nr_running);
 	SEQ_printf(m, "  .%-30s: %lu\n", "load",
 		   rq->ls.load.weight);
-	P(ls.delta_fair);
-	P(ls.delta_exec);
 	P(nr_switches);
 	P(nr_load_updates);
 	P(nr_uninterruptible);