Duplicate memcached servers in cinder.conf

Resulted cinder.conf contains duplicate members list:
memcached_servers=10.157.218.16:11211,10.157.218.17:11211,10.157.218.18:11211,
10.157.218.16:11211,10.157.218.17:11211,10.157.218.18:11211

Change-Id: I057e5d57f8c7c72ac6c31e0446d642b44dbbf3c6
Related-Prod: PROD-23877
diff --git a/cinder/control/cluster.yml b/cinder/control/cluster.yml
index b56f46f..3eefcb7 100644
--- a/cinder/control/cluster.yml
+++ b/cinder/control/cluster.yml
@@ -75,14 +75,6 @@
         ssl:
           enabled: ${_param:rabbitmq_ssl_enabled}
       cache:
-        engine: memcached
-        members:
-        - host: ${_param:cluster_node01_address}
-          port: 11211
-        - host: ${_param:cluster_node02_address}
-          port: 11211
-        - host: ${_param:cluster_node03_address}
-          port: 11211
         security:
           enabled: ${_param:cinder_memcache_security_enabled}
           strategy: ${_param:openstack_memcache_security_strategy}