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 b4db2b35fc
("afs: Use core kernel UUID generation").

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: David Howells <dhowells@redhat.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20201129200550.2433401-1-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

include/linux/netdevice.h

@@ -2815,7 +2815,6 @@ unsigned long netdev_boot_base(const char *prefix, int unit);
 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

@@ -1069,19 +1069,6 @@ struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
 }
 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;