netfilter: xt_connlimit: don't store address in the conn nodes

BugLink: https://bugs.launchpad.net/bugs/1811094

Only stored, never read.  This is a leftover from commit 7d084877
("netfilter: connlimit: use rbtree for per-host conntrack obj storage"),
which added the rbtree node struct that stores the address instead.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
(cherry picked from commit ce49480d)
Signed-off-by: Mauricio Faria de Oliveira <mfo@canonical.com>
Acked-by: Khalid Elmously <khalid.elmously@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

net/netfilter/xt_connlimit.c

@@ -46,7 +46,6 @@
 struct xt_connlimit_conn {
 	struct hlist_node		node;
 	struct nf_conntrack_tuple	tuple;
-	union nf_inet_addr		addr;
 };
 
 struct xt_connlimit_rb {
@@ -126,7 +125,6 @@ static bool add_hlist(struct hlist_head *head,
 	if (conn == NULL)
 		return false;
 	conn->tuple = *tuple;
-	conn->addr = *addr;
 	hlist_add_head(&conn->node, head);
 	return true;
 }
@@ -274,7 +272,6 @@ count_tree(struct net *net, struct rb_root *root,
 	}
 
 	conn->tuple = *tuple;
-	conn->addr = *addr;
 	rbconn->addr = *addr;
 
 	INIT_HLIST_HEAD(&rbconn->hhead);