ospfd: address more trivial compiler warnings

* ospf_ase.c
  * ospf_ase_complete_direct_routes(): dismiss unused variable
diff --git a/ospfd/ospf_ase.c b/ospfd/ospf_ase.c
index 3c19931..6a72e31 100644
--- a/ospfd/ospf_ase.c
+++ b/ospfd/ospf_ase.c
@@ -135,7 +135,6 @@
 {
   struct listnode *node;
   struct ospf_path *op;
-  struct interface *ifp;
 
   for (ALL_LIST_ELEMENTS_RO (ro->paths, node, op))
     if (op->nexthop.s_addr == 0)