net: altera: tse: remove mac_an_restart() function

The mac_an_restart() method will only be called if the driver sets
legacy_pre_march2020, which the altera tse driver does not do.
Therefore, providing a stub is unnecessary.

Fixes: fef2998203 ("net: altera: tse: convert to phylink")
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/altera/altera_tse_main.c

@@ -1036,10 +1036,6 @@ static struct net_device_ops altera_tse_netdev_ops = {
 	.ndo_validate_addr	= eth_validate_addr,
 };
 
-static void alt_tse_mac_an_restart(struct phylink_config *config)
-{
-}
-
 static void alt_tse_mac_config(struct phylink_config *config, unsigned int mode,
 			       const struct phylink_link_state *state)
 {
@@ -1096,7 +1092,6 @@ static struct phylink_pcs *alt_tse_select_pcs(struct phylink_config *config,
 }
 
 static const struct phylink_mac_ops alt_tse_phylink_ops = {
-	.mac_an_restart = alt_tse_mac_an_restart,
 	.mac_config = alt_tse_mac_config,
 	.mac_link_down = alt_tse_mac_link_down,
 	.mac_link_up = alt_tse_mac_link_up,