[PATCH] remove kernel/power/pm.c:pm_unregister_all()

Remove the deprecated and no longer used pm_unregister_all().

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Acked-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>