sched/core: Drop debugging leftover trace_printk call

Commit:

  3c18d447 ("sched/core: Check for available DL bandwidth in cpuset_cpu_inactive()")

forgot a trace_printk() debugging piece in and Steve's banner screamed
in dmesg. Remove it.
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Juri Lelli <juri.lelli@arm.com>
Cc: Juri Lelli <juri.lelli@gmail.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1428050570-21041-1-git-send-email-bp@alien8.deSigned-off-by: Ingo Molnar <mingo@kernel.org>

kernel/sched/core.c

@@ -7015,10 +7015,8 @@ static int cpuset_cpu_inactive(struct notifier_block *nfb, unsigned long action,
 
 			rcu_read_unlock_sched();
 
-			if (overflow) {
-				trace_printk("hotplug failed for cpu %lu", cpu);
+			if (overflow)
 				return notifier_from_errno(-EBUSY);
-			}
 		}
 		cpuset_update_active_cpus(false);
 		break;