net: delete __dev_getfirstbyhwtype

The last user of the RTNL brother of dev_getfirstbyhwtype (the latter
being synchronized under RCU) has been deleted in commit b4db2b35fc44
("afs: Use core kernel UUID generation").

Cc: Arnd Bergmann <[e-mail]>
Cc: David Howells <[e-mail]>
Cc: Eric Dumazet <[e-mail]>
Signed-off-by: Vladimir Oltean <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

include/linux/netdevice.h

···
 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
 				       const char *hwaddr);
 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
-struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
 void dev_add_pack(struct packet_type *pt);
 void dev_remove_pack(struct packet_type *pt);
 void __dev_remove_pack(struct packet_type *pt);

net/core/dev.c

···
 }
 EXPORT_SYMBOL(dev_getbyhwaddr_rcu);
 
-struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type)
-{
-	struct net_device *dev;
-
-	ASSERT_RTNL();
-	for_each_netdev(net, dev)
-		if (dev->type == type)
-			return dev;
-
-	return NULL;
-}
-EXPORT_SYMBOL(__dev_getfirstbyhwtype);
-
 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type)
 {
 	struct net_device *dev, *ret = NULL;