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>

include/net/dn_dev.h

@@ -75,7 +75,6 @@ struct dn_dev_parms {
 	unsigned long t3;         /* Default value of t3                */
 	int priority;             /* Priority to be a router            */
 	char *name;               /* Name for sysctl                    */
-	int ctl_name;             /* Index for sysctl                   */
 	int  (*up)(struct net_device *);
 	void (*down)(struct net_device *);
 	void (*timer3)(struct net_device *, struct dn_ifaddr *ifa);