ipv6: drop unused variables in seg6_genl_dumphac

THe seg6_pernet_data variable was set but never used.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/seg6.c

@@ -303,13 +303,9 @@ static int seg6_genl_dumphmac_done(struct netlink_callback *cb)
 static int seg6_genl_dumphmac(struct sk_buff *skb, struct netlink_callback *cb)
 {
 	struct rhashtable_iter *iter = (struct rhashtable_iter *)cb->args[0];
-	struct net *net = sock_net(skb->sk);
-	struct seg6_pernet_data *sdata;
 	struct seg6_hmac_info *hinfo;
 	int ret;
 
-	sdata = seg6_pernet(net);
-
 	ret = rhashtable_walk_start(iter);
 	if (ret && ret != -EAGAIN)
 		goto done;