Fixed failing buck project

Buck project was failing because of a non-existing rule in modules.def.

Change-Id: Ia9e9f1f0a51c9bf0d63bcf19df67a141453e3854
diff --git a/modules.defs b/modules.defs
index 1ed85cc..a9eb97d 100644
--- a/modules.defs
+++ b/modules.defs
@@ -230,7 +230,6 @@
     '//apps/dhcprelay:onos-apps-dhcprelay',
     '//apps/fwd:onos-apps-fwd',
     '//apps/iptopology-api:onos-apps-iptopology-api',
-    '//apps/openstacknode:onos-apps-openstacknode',
     '//apps/routing/common:onos-apps-routing-common',
     '//apps/vtn/vtnrsc:onos-apps-vtn-vtnrsc',
     '//apps/vtn/sfcmgr:onos-apps-vtn-sfcmgr',