l2tp: remove field 'dev' from struct l2tp_eth

This field has never been used.
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/l2tp/l2tp_eth.c

@@ -41,7 +41,6 @@
 
 /* via netdev_priv() */
 struct l2tp_eth {
-	struct net_device	*dev;
 	struct sock		*tunnel_sock;
 	struct l2tp_session	*session;
 	atomic_long_t		tx_bytes;
@@ -60,9 +59,6 @@ struct l2tp_eth_sess {
 
 static int l2tp_eth_dev_init(struct net_device *dev)
 {
-	struct l2tp_eth *priv = netdev_priv(dev);
-
-	priv->dev = dev;
 	eth_hw_addr_random(dev);
 	eth_broadcast_addr(dev->broadcast);
 	netdev_lockdep_set_classes(dev);
@@ -315,7 +311,6 @@ static int l2tp_eth_create(struct net *net, struct l2tp_tunnel *tunnel,
 	l2tp_eth_adjust_mtu(tunnel, session, dev);
 
 	priv = netdev_priv(dev);
-	priv->dev = dev;
 	priv->session = session;
 
 	priv->tunnel_sock = tunnel->sock;