Remove openstack-common.conf

This commit removes openstack-common.conf file. Because we don't use
openstack/common files anymore.

Change-Id: I4654a7cd5be6164f7e5ab6fe683f226713ffc3f8
diff --git a/openstack-common.conf b/openstack-common.conf
deleted file mode 100644
index acb1437..0000000
--- a/openstack-common.conf
+++ /dev/null
@@ -1,9 +0,0 @@
-[DEFAULT]
-
-# The list of modules to copy from openstack-common
-module=install_venv_common
-module=with_venv
-module=install_venv
-
-# The base module to hold the copy of openstack.common
-base=tempest