intel_idle: remove useless return from void function.

Signed-off-by: Richard Cochran <rcochran@linutronix.de>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/idle/intel_idle.c

@@ -1260,8 +1260,6 @@ static void __exit intel_idle_exit(void)
 	__unregister_cpu_notifier(&cpu_hotplug_notifier);
 
 	cpu_notifier_register_done();
-
-	return;
 }
 
 module_init(intel_idle_init);