netfilter: x_tables: remove duplicate ip6t_get_target function call

In the check_target, ip6t_get_target is called twice.
Signed-off-by: NTaehee Yoo <ap420073@gmail.com>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

net/ipv6/netfilter/ip6_tables.c

@@ -528,7 +528,6 @@ static int check_target(struct ip6t_entry *e, struct net *net, const char *name)
 		.family    = NFPROTO_IPV6,
 	};
 
-	t = ip6t_get_target(e);
 	return xt_check_target(&par, t->u.target_size - sizeof(*t),
 			       e->ipv6.proto,
 			       e->ipv6.invflags & IP6T_INV_PROTO);