tomoyo: remove tomoyo_gc_thread()->daemonize()

daemonize() is only needed when a user-space task does kernel_thread().

tomoyo_gc_thread() is kthread_create()'ed and thus it doesn't need
the soon-to-be-deprecated daemonize().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: James Morris <jmorris@namei.org>

security/tomoyo/gc.c

@@ -660,7 +660,7 @@ static int tomoyo_gc_thread(void *unused)
 	static DEFINE_MUTEX(tomoyo_gc_mutex);
 	if (!mutex_trylock(&tomoyo_gc_mutex))
 		goto out;
-	daemonize("GC for TOMOYO");
+
 	do {
 		tomoyo_collect_entry();
 		if (list_empty(&tomoyo_gc_list))