[NET]: Remove the empty net_table

I have removed all the entries from this table (core_table,
ipv4_table and tr_table), so now we can safely drop it.
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/linux/net.h

@@ -337,7 +337,6 @@ static const struct proto_ops name##_ops = {			\
 
 #ifdef CONFIG_SYSCTL
 #include <linux/sysctl.h>
-extern ctl_table net_table[];
 extern int net_msg_cost;
 extern int net_msg_burst;
 #endif

kernel/sysctl.c

@@ -200,14 +200,6 @@ static struct ctl_table root_table[] = {
 		.mode		= 0555,
 		.child		= vm_table,
 	},
-#ifdef CONFIG_NET
-	{
-		.ctl_name	= CTL_NET,
-		.procname	= "net",
-		.mode		= 0555,
-		.child		= net_table,
-	},
-#endif
 	{
 		.ctl_name	= CTL_FS,
 		.procname	= "fs",

net/sysctl_net.c

@@ -30,10 +30,6 @@
 #include <linux/if_tr.h>
 #endif
 
-struct ctl_table net_table[] = {
-	{ 0 },
-};
-
 static struct list_head *
 net_ctl_header_lookup(struct ctl_table_root *root, struct nsproxy *namespaces)
 {