batman-adv: remove unused inline function batadv_arp_change_timeout

There's no callers in-tree.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>

net/batman-adv/distributed-arp-table.h

@@ -163,11 +163,6 @@ static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
 {
 }
 
-static inline void batadv_arp_change_timeout(struct net_device *soft_iface,
-					     const char *name)
-{
-}
-
 static inline int batadv_dat_init(struct batadv_priv *bat_priv)
 {
 	return 0;