ipv4: Fix over-ifdeffing of ip_static_sysctl_init.

Noticed by Paulius Zaleckas.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/route.c

@@ -3223,9 +3223,7 @@ int __init ip_rt_init(void)
  */
 void __init ip_static_sysctl_init(void)
 {
-#ifdef CONFIG_SYSCTL
 	register_sysctl_paths(ipv4_route_path, ipv4_route_table);
-#endif
 }
 #endif