ipmr: remove useless checks from ipmr_device_event

The net being checked there is dev_net(dev) and thus this if
is always false.

Fits both net and net-next trees.
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/ipmr.c

@@ -1163,9 +1163,6 @@ static int ipmr_device_event(struct notifier_block *this, unsigned long event, v
 	int ct;
 	LIST_HEAD(list);
 
-	if (!net_eq(dev_net(dev), net))
-		return NOTIFY_DONE;
-
 	if (event != NETDEV_UNREGISTER)
 		return NOTIFY_DONE;
 	v = &net->ipv4.vif_table[0];