sysctl net: Remove unused binary sysctl code

Now that sys_sysctl is a compatiblity wrapper around /proc/sys
all sysctl strategy routines, and all ctl_name and strategy
entries in the sysctl tables are unused, and can be
revmoed.

In addition neigh_sysctl_register has been modified to no longer
take a strategy argument and it's callers have been modified not
to pass one.

Cc: "David Miller" <davem@davemloft.net>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

net/ipv6/xfrm6_policy.c

@@ -309,7 +309,6 @@ static void xfrm6_policy_fini(void)
 #ifdef CONFIG_SYSCTL
 static struct ctl_table xfrm6_policy_table[] = {
 	{
-		.ctl_name       = CTL_UNNUMBERED,
 		.procname       = "xfrm6_gc_thresh",
 		.data	   	= &xfrm6_dst_ops.gc_thresh,
 		.maxlen	 	= sizeof(int),