Remove tags from README

The tags framework has been discontinued for a long time.

https://governance.openstack.org/tc/reference/tags/

https://governance.openstack.org/tc/resolutions/20211224-tags-framework-removal.html

Change-Id: I1ffae10bd034de52bb8287d8b0e3103e9e9835ae

Author: anfimovir

README.rst

@@ -1,12 +1,4 @@
-========================
-Team and repository tags
-========================
-
-.. image:: https://governance.openstack.org/tc/badges/python-cinderclient.svg
-    :target: https://governance.openstack.org/tc/reference/tags/index.html
-
-.. Change things from this point on
-
+===========================================
 Python bindings to the OpenStack Cinder API
 ===========================================