bonding: remove bond_next_slave()

There are no users left, so it's safe to remove.

CC: Jay Vosburgh <fubar@us.ibm.com>
CC: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: NVeaceslav Falico <vfalico@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/bonding/bonding.h

@@ -89,9 +89,6 @@
 #define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
 #define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
 
-/* Since bond_first/last_slave can return NULL, these can return NULL too */
-#define bond_next_slave(bond, pos) __bond_next_slave(bond, pos)
-
 /**
  * bond_for_each_slave - iterate over all slaves
  * @bond:	the bond holding this list
@@ -243,34 +240,6 @@ struct bonding {
 #define bond_slave_get_rtnl(dev) \
 	((struct slave *) rtnl_dereference(dev->rx_handler_data))
 
-/**
- * __bond_next_slave - get the next slave after the one provided
- * @bond - bonding struct
- * @slave - the slave provided
- *
- * Returns the next slave after the slave provided, first slave if the
- * slave provided is the last slave and NULL if slave is not found
- */
-static inline struct slave *__bond_next_slave(struct bonding *bond,
-					      struct slave *slave)
-{
-	struct slave *slave_iter;
-	struct list_head *iter;
-	bool found = false;
-
-	netdev_for_each_lower_private(bond->dev, slave_iter, iter) {
-		if (found)
-			return slave_iter;
-		if (slave_iter == slave)
-			found = true;
-	}
-
-	if (found)
-		return bond_first_slave(bond);
-
-	return NULL;
-}
-
 /**
  * Returns NULL if the net_device does not belong to any of the bond's slaves
  *