Revert "UBUNTU: SAUCE: apparmor: Fix: break circular refcount for label that is directly freed."

BugLink: http://bugs.launchpad.net/bugs/1379535

This reverts commit 5f63d8b8931e1e33c62793583e9e5ed66ca9cc4b.
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

security/apparmor/label.c

@@ -227,10 +227,6 @@ void aa_label_destroy(struct aa_label *label)
 			label->ent[i.i] = LABEL_POISON + i.i;
 		}
 	}
-
-	if (rcu_dereference_protected(label->replacedby->label, true) == label)
-		rcu_assign_pointer(label->replacedby->label, NULL);
-
 	aa_free_sid(label->sid);
 	aa_put_replacedby(label->replacedby);
 	label->replacedby = REPLACEDBY_POISON + 1;