mlxsw: spectrum_flow: Drop an unused field

The field "dev" in struct mlxsw_sp_flow_block_binding is not used. Drop it.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum.h

@@ -710,7 +710,6 @@ struct mlxsw_sp_flow_block {
 
 struct mlxsw_sp_flow_block_binding {
 	struct list_head list;
-	struct net_device *dev;
 	struct mlxsw_sp_port *mlxsw_sp_port;
 	bool ingress;
 };