Remove Temporary keystone config workaround

oslo.cache commit[1] is now included in RDO[2] and promoted.

[1] https://review.opendev.org/c/openstack/oslo.cache/+/952014
[2] https://review.rdoproject.org/r/c/rdoinfo/+/57810

Related-Issue: #OSPCIX-901

Author: karelyatin

zuul.d/edpm_multinode.yaml

@@ -317,26 +317,6 @@
       cifmw_extras:
         - '@scenarios/centos-9/multinode-ci.yml'
         - '@scenarios/centos-9/horizon.yml'
-      # Temporary until https://review.opendev.org/c/openstack/oslo.cache/+/952014
-      # is included in rdo and promoted
-      cifmw_edpm_prepare_kustomizations:
-        - apiVersion: kustomize.config.k8s.io/v1beta1
-          kind: Kustomization
-          namespace: openstack
-          patches:
-            - patch: |-
-                apiVersion: core.openstack.org/v1beta1
-                kind: OpenStackControlPlane
-                metadata:
-                  name: unused
-                spec:
-                  keystone:
-                    template:
-                      customServiceConfig: |
-                        [cache]
-                        memcache_sasl_enabled = true
-              target:
-                kind: OpenStackControlPlane
     run:
       - ci/playbooks/edpm/run.yml