ospfd: Remove the blocking of opaque LSAs origination & flooding 'optimisation'

* Opaque support contains some kind of hack/optimisation to
  origination/flooding to suppress some origins/floods until an opaque LS
  Acks are received.  Previous versions of the code have already been shown
  to have bugs in them (see e16fd8a5, e.g.). It seems over-complex and fragile,
  plus its conceptually the wrong place to try implement flooding hacks that,
  AFAICT, do not depend particularly on the semantics of opaque LSA.

  Nuke.

Tested-by: Olivier Dugeon <olivier.dugeon@orange.com>
diff --git a/ospfd/ospf_packet.c b/ospfd/ospf_packet.c
index b97e3a7..d597653 100644
--- a/ospfd/ospf_packet.c
+++ b/ospfd/ospf_packet.c
@@ -2125,14 +2125,7 @@
       lsr = ospf_ls_retransmit_lookup (nbr, lsa);
 
       if (lsr != NULL && ospf_lsa_more_recent (lsr, lsa) == 0)
-        {
-#ifdef HAVE_OPAQUE_LSA
-          if (IS_OPAQUE_LSA (lsr->data->type))
-            ospf_opaque_ls_ack_received (nbr, lsr);
-#endif /* HAVE_OPAQUE_LSA */
-
-          ospf_ls_retransmit_delete (nbr, lsr);
-        }
+        ospf_ls_retransmit_delete (nbr, lsr);
 
       lsa->data = NULL;
       ospf_lsa_discard (lsa);