cleanup: Remove support for Delete and Unmounting v1.1.0 PVC

as v1.0.0 is deprecated we need to remove the support
for it in the Next coming (v3.0.0) release. This PR
removes the support for the same.

closes #882

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

deploy/cephfs/kubernetes/csi-cephfsplugin.yaml

@@ -62,7 +62,6 @@ spec:
             - "--endpoint=$(CSI_ENDPOINT)"
             - "--v=5"
             - "--drivername=cephfs.csi.ceph.com"
-            - "--metadatastorage=k8s_configmap"
             # If topology based provisioning is desired, configure required
             # node labels representing the nodes topology domain
             # and pass the label names below, for CSI to consume and advertize
@@ -77,10 +76,6 @@ spec:
               valueFrom:
                 fieldRef:
                   fieldPath: spec.nodeName
-            - name: POD_NAMESPACE
-              valueFrom:
-                fieldRef:
-                  fieldPath: metadata.namespace
             - name: CSI_ENDPOINT
               value: unix:///csi/csi.sock
           imagePullPolicy: "IfNotPresent"