Remove cinder charm upgrade issue

This note no longer applies due to a cinder charm
commit revert.

Change-Id: Icb65addc48b0a130049d56436b53703392f78def

deploy-guide/source/upgrade-issues.rst

@@ -75,21 +75,6 @@ exporting shares after restart`_, the nfs-ganesha Ubuntu package must be
 updated on all affected units prior to the upgrading of the manila-ganesha
 charm in OpenStack Charms 21.10.
 
-cinder charm: Pure Storage volumes
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-For OpenStack releases Pike through Ussuri (inclusive) there is a problem in
-creating Cinder volumes backed by Pure Storage (charm cinder-purestorage) with
-the 21.10 release of the cinder charm.
-
-A newly-created volume will go into an error state and the following message
-will appear in the Cinder logs: "Active-Active configuration is not currently
-supported". This issue is tracked in bug `LP #1947702`_.
-
-Affected environments are therefore discouraged from upgrading the cinder charm
-to the 21.10 release until the issue is resolved for other supported OpenStack
-releases.
-
 OpenStack upgrades
 ------------------
 
@@ -328,4 +313,3 @@ error can be resolved with:
 .. _LP #1912638: https://bugs.launchpad.net/charm-rabbitmq-server/+bug/1912638
 .. _LP #1928992: https://bugs.launchpad.net/charm-deployment-guide/+bug/1928992
 .. _LP #1929254: https://bugs.launchpad.net/charm-ceph-osd/+bug/1929254
-.. _LP #1947702: https://bugs.launchpad.net/bugs/1947702