net: ipv4: remove fib_lookup.h from devinet.c include list

nothing in devinet.c relies on fib_lookup.h; remove it from the includes
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/devinet.c

@@ -65,8 +65,6 @@
 #include <net/net_namespace.h>
 #include <net/addrconf.h>
 
-#include "fib_lookup.h"
-
 static struct ipv4_devconf ipv4_devconf = {
 	.data = {
 		[IPV4_DEVCONF_ACCEPT_REDIRECTS - 1] = 1,