net: sched: act_nat: get rid of tcf_nat_walker and tcf_nat_search

tcf_nat_walker() and tcf_nat_search() do the same thing as generic
walk/search function, so remove them.
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/act_nat.c

@@ -288,23 +288,6 @@ static int tcf_nat_dump(struct sk_buff *skb, struct tc_action *a,
 	return -1;
 }
 
-static int tcf_nat_walker(struct net *net, struct sk_buff *skb,
-			  struct netlink_callback *cb, int type,
-			  const struct tc_action_ops *ops,
-			  struct netlink_ext_ack *extack)
-{
-	struct tc_action_net *tn = net_generic(net, act_nat_ops.net_id);
-
-	return tcf_generic_walker(tn, skb, cb, type, ops, extack);
-}
-
-static int tcf_nat_search(struct net *net, struct tc_action **a, u32 index)
-{
-	struct tc_action_net *tn = net_generic(net, act_nat_ops.net_id);
-
-	return tcf_idr_search(tn, a, index);
-}
-
 static struct tc_action_ops act_nat_ops = {
 	.kind		=	"nat",
 	.id		=	TCA_ID_NAT,
@@ -312,8 +295,6 @@ static struct tc_action_ops act_nat_ops = {
 	.act		=	tcf_nat_act,
 	.dump		=	tcf_nat_dump,
 	.init		=	tcf_nat_init,
-	.walk		=	tcf_nat_walker,
-	.lookup		=	tcf_nat_search,
 	.size		=	sizeof(struct tcf_nat),
 };