Remove usued, redundant and deprecated code from lookup.h

Change-Id: Ic16bc10d0b2877b2afdf052615f9334f31b9519f
Signed-off-by: Neale Ranns <nranns@cisco.com>
diff --git a/src/vnet/ip/ip4_source_check.c b/src/vnet/ip/ip4_source_check.c
index 6831066..63b7594 100644
--- a/src/vnet/ip/ip4_source_check.c
+++ b/src/vnet/ip/ip4_source_check.c
@@ -492,7 +492,7 @@
 
   if (~0 != table_id)
     {
-      fib_index = fib_table_id_find_fib_index (pfx.fp_proto, table_id);
+      fib_index = fib_table_find (pfx.fp_proto, table_id);
       if (~0 == fib_index)
 	{
 	  error = clib_error_return (0, "Nonexistent table id %d", table_id);