audit: remove unnecessary 'ret' initialization

The variable 'ret' is set to 0 when declared.
The 'ret' is unused until it is set to 0 again.

So it had better remove unnecessary initialization.
Signed-off-by: Austin Kim <austin.kim@lge.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

security/lsm_audit.c

@@ -119,7 +119,6 @@ int ipv6_skb_to_auditdata(struct sk_buff *skb,
 		return -EINVAL;
 	ad->u.net->v6info.saddr = ip6->saddr;
 	ad->u.net->v6info.daddr = ip6->daddr;
-	ret = 0;
 	/* IPv6 can have several extension header before the Transport header
 	 * skip them */
 	offset = skb_network_offset(skb);