Remove setting of version/release from releasenotes

Release notes are version independent, so remove version/release
values. We've found that projects now require the service package
to be installed in order to build release notes, and this is entirely
due to the current convention of pulling in the version information.

Release notes should not need installation in order to build, so this
unnecessary version setting needs to be removed.

This is needed for new release notes publishing, see
I56909152975f731a9d2c21b2825b972195e48ee8 and the discussion starting
at
http://lists.openstack.org/pipermail/openstack-dev/2017-November/124480.html
.

Change-Id: I623fe918c1e4ddafa93efc91ed550a365cec1cf0

releasenotes/source/conf.py

@@ -34,8 +34,6 @@
 
 import datetime
 
-from swiftclient import __version__
-
 # -- General configuration ------------------------------------------------
 
 # If your documentation needs a minimal Sphinx version, state it here.
@@ -70,14 +68,11 @@ master_doc = 'index'
 project = u'Swift Client Release Notes'
 copyright = u'%d, OpenStack Foundation' % datetime.datetime.now().year
 
-# The version info for the project you're documenting, acts as replacement for
-# |version| and |release|, also used in various other places throughout the
-# built documents.
-#
+# Release notes are version independent.
 # The short X.Y version.
-version = __version__.rsplit('.', 1)[0]
+version = ''
 # The full version, including alpha/beta/rc tags.
-release = __version__
+release = ''
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.