ipset: remove unused function __ip_set_get_netlink

There are no in-tree callers.
Signed-off-by: Aaron Conole <aconole@bytheb.org>
Acked-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/ipset/ip_set_core.c

@@ -500,14 +500,6 @@ __ip_set_put(struct ip_set *set)
 /* set->ref can be swapped out by ip_set_swap, netlink events (like dump) need
  * a separate reference counter
  */
-static inline void
-__ip_set_get_netlink(struct ip_set *set)
-{
-	write_lock_bh(&ip_set_ref_lock);
-	set->ref_netlink++;
-	write_unlock_bh(&ip_set_ref_lock);
-}
-
 static inline void
 __ip_set_put_netlink(struct ip_set *set)
 {