Removing the cluster from the kubernetes spec section of the wdt k8s template file (#2372)

Co-authored-by: BHAVANI.RAVICHANDRAN@ORACLE.COM <bravicha@bravicha-1.subnet1ad1phx.devweblogicphx.oraclevcn.com>

Author: bhavaniravichandran

kubernetes/samples/scripts/create-weblogic-domain/domain-home-on-pv/wdt_k8s_model_template.yaml

@@ -93,10 +93,10 @@ kubernetes:
 
     # clusters is used to configure the desired behavior for starting member servers of a cluster.
     # If you use this entry, then the rules will be applied to ALL servers that are members of the named clusters.
-    clusters:
-     '@@PROP:clusterName@@':
-       serverStartState: "RUNNING"
-       replicas: %INITIAL_MANAGED_SERVER_REPLICAS%
+    #clusters:
+    # '@@PROP:clusterName@@':
+    #   serverStartState: "RUNNING"
+    #   replicas: %INITIAL_MANAGED_SERVER_REPLICAS%
 
     # Istio service mesh support is experimental.
     %ISTIO_PREFIX%configuration: