xfrm: remove unused xfrm4_policy_fini()

Function xfrm4_policy_fini() is unused since xfrm4_fini() was
removed in 2.6.11.
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

net/ipv4/xfrm4_policy.c

@@ -270,15 +270,6 @@ static void __init xfrm4_policy_init(void)
 	xfrm_policy_register_afinfo(&xfrm4_policy_afinfo);
 }
 
-static void __exit xfrm4_policy_fini(void)
-{
-#ifdef CONFIG_SYSCTL
-	if (sysctl_hdr)
-		unregister_net_sysctl_table(sysctl_hdr);
-#endif
-	xfrm_policy_unregister_afinfo(&xfrm4_policy_afinfo);
-}
-
 void __init xfrm4_init(void)
 {
 	dst_entries_init(&xfrm4_dst_ops);