Revert "[bgpd] Add 'bgp open-accept' option, to send OPEN immediately on accepted conns"

Revert commit d664ae1182c29b74b409bc8594b7bd0575e91ce9. An experimental
patch which violates RFC4271 quite badly, but managed to accidently sneak
its way in.
diff --git a/bgpd/bgp_fsm.c b/bgpd/bgp_fsm.c
index df1cfb7..15bd8a6 100644
--- a/bgpd/bgp_fsm.c
+++ b/bgpd/bgp_fsm.c
@@ -616,8 +616,7 @@
 	zlog_debug ("%s passive open", peer->host);
     }
 
-  if (!CHECK_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER)
-      || bgp_option_check (BGP_OPT_ALWAYS_OPEN))
+  if (! CHECK_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER))
     bgp_open_send (peer);
 
   return 0;