net: remove netif_tx_napi_add()

All callers are now gone.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/netdevice.h

@@ -2569,8 +2569,6 @@ netif_napi_add_tx_weight(struct net_device *dev,
 	netif_napi_add_weight(dev, napi, poll, weight);
 }
 
-#define netif_tx_napi_add netif_napi_add_tx_weight
-
 /**
  * netif_napi_add_tx() - initialize a NAPI context to be used for Tx only
  * @dev:  network device