How to remove logging-ops cluster

Issue

• How to remove logging-ops from cluster.
• Unable to remove logging-ops from cluster.
• How to remove Logging EFK OPS cluster.
• Steps to remove logging-ops from existing cluster.
• Failed to remove logging efk ops.
• Unable to uninstall using openshift_logging_use_ops=false.
• Tried by removing following section from fluentd daemonset.

        - name: OPS_HOST
          value: logging-es-ops
        - name: OPS_PORT
          value: "9200"
        - name: OPS_CLIENT_CERT
          value: /etc/fluent/keys/cert
        - name: OPS_CLIENT_KEY
          value: /etc/fluent/keys/key
        - name: OPS_CA
          value: /etc/fluent/keys/ca

Also deleted all ops deployment config, configmap, replication controller, pod. Fluentd is unable to collect logs, show following errors.

2018-10-02 03:10:02 -0400 [warn]: temporarily failed to flush the buffer. next_retry=2018-10-02 03:10:03 -0400 error_class="URI::InvalidURIError" error="the scheme https does not accept registry part: fluentd:changeme@:0 (or bad hostname?)" plugin_id="object:1451388"
  2018-10-02 03:10:02 -0400 [warn]: suppressed same stacktrace
2018-10-02 03:10:03 -0400 [warn]: temporarily failed to flush the buffer. next_retry=2018-10-02 03:10:07 -0400 error_class="URI::InvalidURIError" error="the scheme https does not accept registry part: fluentd:changeme@:0 (or bad hostname?)" plugin_id="object:1451388"