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/rbd/kubernetes/csi-rbdplugin-provisioner.yaml

@@ -74,10 +74,6 @@ spec:
           env:
             - name: ADDRESS
               value: /csi/csi-provisioner.sock
-            - name: POD_NAMESPACE
-              valueFrom:
-                fieldRef:
-                  fieldPath: metadata.namespace
           imagePullPolicy: "IfNotPresent"
           volumeMounts:
             - name: socket-dir

deploy/rbd/kubernetes/csi-rbdplugin.yaml

@@ -77,10 +77,6 @@ spec:
               valueFrom:
                 fieldRef:
                   fieldPath: spec.nodeName
-            - name: POD_NAMESPACE
-              valueFrom:
-                fieldRef:
-                  fieldPath: metadata.namespace
             - name: CSI_ENDPOINT
               value: unix:///csi/csi.sock
           imagePullPolicy: "IfNotPresent"