Remove incorrect comment from include/trace/events/power.h

The code is not going to be removed, so remove the comment stating
that it will be.
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

include/trace/events/power.h

@@ -65,7 +65,6 @@ TRACE_EVENT(machine_suspend,
 	TP_printk("state=%lu", (unsigned long)__entry->state)
 );
 
-/* This code will be removed after deprecation time exceeded (3.1) */
 #ifdef CONFIG_EVENT_POWER_TRACING_DEPRECATED
 
 /*