ip6_tunnel: Remove duplicate assignments

There is a same action when the variable is initialized
Signed-off-by: NHongbin Wang <wh_bin@126.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv6/ip6_tunnel.c

@@ -257,8 +257,6 @@ static int ip6_tnl_create2(struct net_device *dev)
 	struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
 	int err;
 
-	t = netdev_priv(dev);
-
 	dev->rtnl_link_ops = &ip6_link_ops;
 	err = register_netdevice(dev);
 	if (err < 0)