security/apparmor/label.c: Clean code by removing redundant instructions

Previously 'label->proxy->label' value checking
and conditional reassigning were done twice in the same function.
The second one is redundant and can be removed.

Signed-off-by: Mateusz Nosek <[e-mail]>
Signed-off-by: John Johansen <[e-mail]>

security/apparmor/label.c

···
 
 static void label_destroy(struct aa_label *label)
 {
-	struct aa_label *tmp;
-
 	AA_BUG(!label);
 
 	if (!label_isprofile(label)) {
···
 		rcu_assign_pointer(label->proxy->label, NULL);
 
 	aa_free_secid(label->secid);
-
-	tmp = rcu_dereference_protected(label->proxy->label, true);
-	if (tmp == label)
-		rcu_assign_pointer(label->proxy->label, NULL);
 
 	aa_put_proxy(label->proxy);
 	label->proxy = (struct aa_proxy *) PROXY_POISON + 1;