sysctl: ipv6 route flushing (kill binary path)

We don't preoperly support the sysctl binary path for flushing the ipv6
routes.  So remove support for a binary path.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Alexey Dobriyan <adobriyan@sw.ru>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

net/ipv6/route.c

@@ -2397,7 +2397,6 @@ int ipv6_sysctl_rtcache_flush(ctl_table *ctl, int write, struct file * filp,
 
 ctl_table ipv6_route_table[] = {
 	{
-		.ctl_name	=	NET_IPV6_ROUTE_FLUSH,
 		.procname	=	"flush",
 		.data		=	&flush_delay,
 		.maxlen		=	sizeof(int),