Remove ryu/contrib/ovs from debian/copyright (folder is gone).

debian/changelog

@@ -1,6 +1,7 @@
 ryu (4.4+dfsg1-1) experimental; urgency=medium
 
   * New upstream release.
+  * Remove ryu/contrib/ovs from debian/copyright (folder is gone).
 
  -- Thomas Goirand <zigo@debian.org>  Fri, 15 Jul 2016 16:13:52 +0200
 

debian/copyright

@@ -22,10 +22,6 @@ Files: ryu/contrib/tinyrpc/*
 Copyright: 2013 Marc Brinkmann
 License: MIT
 
-Files: ryu/contrib/ovs/*
-Copyright: 2009-2013 Nicira, Inc.
-License: Apache-2.0
-
 Files: tools/with_venv.sh
 Copyright: 2011 OpenStack LLC
 License: Apache-2.0
@@ -42,7 +38,6 @@ Copyright: 2013-2014 Nippon Telegraph and Telephone Corporation
            2013-2014 YAMAMOTO Takashi <yamamoto@valinux.co.jp>
 License: Apache-2.0
 
-
 Files: ryu/cmd/rpc_cli.py ryu/cmd/of_config_cli.py ryu/cmd/ryu_base.py
 Copyright: 2013-2014 Nippon Telegraph and Telephone Corporation
            2013-2014 YAMAMOTO Takashi <yamamoto@valinux.co.jp>