Deprecate grpc metrics in ceph-csi

As kubernetes CSI sidecar is exposing the
GRPC mertics we can make use of the same in
ceph-csi we dont need to expose our own.

update: #881

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

charts/ceph-csi-rbd/templates/nodeplugin-daemonset.yaml

@@ -77,11 +77,6 @@ spec:
             - "--type=rbd"
             - "--nodeserver=true"
             - "--pidlimit=-1"
-{{- if .Values.nodeplugin.grpcMetrics.enabled }}
-            - "--metricsport={{ .Values.nodeplugin.grpcMetrics.containerPort }}"
-            - "--metricspath=/metrics"
-            - "--enablegrpcmetrics=true"
-{{- end }}
             - "--endpoint=$(CSI_ENDPOINT)"
             - "--v=5"
             - "--drivername=$(DRIVER_NAME)"