net: kill useless net_*_ingress_queue() definitions when NET_CLS_ACT is unset

This fixes 4577139b ("net: use jump label patching for ingress qdisc in
__netif_receive_skb_core").

The only client of this is sch_ingress and it depends on NET_CLS_ACT. So
there is no way these definition can be of any help.

Cc: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/rtnetlink.h

@@ -82,14 +82,6 @@ struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
 #ifdef CONFIG_NET_CLS_ACT
 void net_inc_ingress_queue(void);
 void net_dec_ingress_queue(void);
-#else
-static inline void net_inc_ingress_queue(void)
-{
-}
-
-static inline void net_dec_ingress_queue(void)
-{
-}
 #endif
 
 extern void rtnetlink_init(void);