Don't include openstack directory in exclude list for flake8
Directory openstack doesn't exist, so don't need skip it.
Change-Id: I68c841019a52393bde5852bf390452c7aa127e94
diff --git a/tox.ini b/tox.ini
index 05fa326..202ffa6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -153,7 +153,7 @@
# Skipped because of new hacking 0.9: H405
ignore = E125,E123,E129
show-source = True
-exclude = .git,.venv,.tox,dist,doc,openstack,*egg
+exclude = .git,.venv,.tox,dist,doc,*egg
[testenv:releasenotes]
commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html