net ipv4: Remove the unneeded registration of an empty net/ipv4/neigh

sysctl no longer requires explicit creation of directories.  The neigh
directory is always populated with at least a default entry so this
won't cause any user visible changes.

Delete the ipv4_path and the ipv4_skeleton these are no longer needed.

Directly register the ipv4_route_table.

And since I am an idiot remove the header definitions that I should
have removed in the previous patch.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/ipv6.h

@@ -661,8 +661,6 @@ extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
 extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
 extern int ipv6_sysctl_register(void);
 extern void ipv6_sysctl_unregister(void);
-extern int ipv6_static_sysctl_register(void);
-extern void ipv6_static_sysctl_unregister(void);
 #endif
 
 #endif /* _NET_IPV6_H */

net/ipv4/route.c

@@ -3344,23 +3344,6 @@ static ctl_table ipv4_route_table[] = {
 	{ }
 };
 
-static struct ctl_table empty[1];
-
-static struct ctl_table ipv4_skeleton[] =
-{
-	{ .procname = "route", 
-	  .mode = 0555, .child = ipv4_route_table},
-	{ .procname = "neigh", 
-	  .mode = 0555, .child = empty},
-	{ }
-};
-
-static __net_initdata struct ctl_path ipv4_path[] = {
-	{ .procname = "net", },
-	{ .procname = "ipv4", },
-	{ },
-};
-
 static struct ctl_table ipv4_route_flush_table[] = {
 	{
 		.procname	= "flush",
@@ -3515,6 +3498,6 @@ int __init ip_rt_init(void)
  */
 void __init ip_static_sysctl_init(void)
 {
-	kmemleak_not_leak(register_net_sysctl_table(&init_net, ipv4_path, ipv4_skeleton));
+	register_net_sysctl(&init_net, "net/ipv4/route", ipv4_route_table);
 }
 #endif