selinux: drop the unnecessary aurule_callback variable

Its value is actually not changed anywhere, so it can be substituted for
a direct call to audit_update_lsm_rules().
Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

security/selinux/ss/services.c

@@ -3693,15 +3693,11 @@ int selinux_audit_rule_match(u32 sid, u32 field, u32 op, void *vrule)
 	return match;
 }
 
-static int (*aurule_callback)(void) = audit_update_lsm_rules;
-
 static int aurule_avc_callback(u32 event)
 {
-	int err = 0;
-
-	if (event == AVC_CALLBACK_RESET && aurule_callback)
-		err = aurule_callback();
-	return err;
+	if (event == AVC_CALLBACK_RESET)
+		return audit_update_lsm_rules();
+	return 0;
 }
 
 static int __init aurule_init(void)