deploy/operator: remove newly added app label from selector list

Adding this label breaks operator upgrades using OLM, as the previous
(v0.9.x) versions do not have this label that results in mismatched
label selector.

Author: avalluri

deploy/kustomize/operator/operator.yaml

@@ -119,7 +119,6 @@ metadata:
 spec:
   selector:
     name: pmem-csi-operator
-    app: pmem-csi-operator
   ports:
   - port: 8080
     targetPort: 8080
@@ -134,7 +133,6 @@ spec:
   selector:
     matchLabels:
       name: pmem-csi-operator
-      app: pmem-csi-operator
   template:
     metadata:
       labels:

deploy/operator/pmem-csi-operator.yaml

@@ -150,7 +150,6 @@ spec:
   - port: 8080
     targetPort: 8080
   selector:
-    app: pmem-csi-operator
     name: pmem-csi-operator
 ---
 apiVersion: apps/v1
@@ -162,7 +161,6 @@ spec:
   replicas: 1
   selector:
     matchLabels:
-      app: pmem-csi-operator
       name: pmem-csi-operator
   template:
     metadata: