net: l3mdev: Remove netif_index_is_l3_master

No longer used after e0d56fdd ("net: l3mdev: remove redundant calls")
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/l3mdev.h

@@ -114,25 +114,6 @@ static inline u32 l3mdev_fib_table(const struct net_device *dev)
 	return tb_id;
 }
 
-static inline bool netif_index_is_l3_master(struct net *net, int ifindex)
-{
-	struct net_device *dev;
-	bool rc = false;
-
-	if (ifindex == 0)
-		return false;
-
-	rcu_read_lock();
-
-	dev = dev_get_by_index_rcu(net, ifindex);
-	if (dev)
-		rc = netif_is_l3_master(dev);
-
-	rcu_read_unlock();
-
-	return rc;
-}
-
 struct dst_entry *l3mdev_link_scope_lookup(struct net *net, struct flowi6 *fl6);
 
 static inline
@@ -226,11 +207,6 @@ static inline u32 l3mdev_fib_table_by_index(struct net *net, int ifindex)
 	return 0;
 }
 
-static inline bool netif_index_is_l3_master(struct net *net, int ifindex)
-{
-	return false;
-}
-
 static inline
 struct dst_entry *l3mdev_link_scope_lookup(struct net *net, struct flowi6 *fl6)
 {