[YUNIKORN-2091] Remove last remnants of Application CRD (apache#710)

Closes: apache#710

deployments/scheduler/yunikorn-rbac.yaml

@@ -38,9 +38,6 @@ rules:
   - apiGroups: [""]
     resources: ["pods"]
     verbs: ["get", "watch", "list", "create", "patch", "update", "delete"]
-  - apiGroups: ["yunikorn.apache.org"]
-    resources: ["*"]
-    verbs: ["*"]
   - apiGroups: ["sparkoperator.k8s.io"]
     resources: ["*"]
     verbs: ["*"]

pkg/appmgmt/interfaces/appmgr.go

@@ -33,9 +33,7 @@ type AppManager interface {
 	// this will be called before starting the service.
 	ServiceInit() error
 
-	// if the service has some internal stuff to run, this is the place to run them
-	// usually if an application is defined as K8s CRD, the operator service needs
-	// to watch on these CRD events. the CRD informers can be launched here.
+	// if the service has some internal stuff to run, this is the place to run them.
 	// some implementation may not need to implement this.
 	Start() error
 

pkg/common/constants/constants.go

@@ -64,9 +64,6 @@ const SchedulerName = "yunikorn"
 // OwnerReferences
 const DaemonSetType = "DaemonSet"
 
-// Application crd
-const AppManagerHandlerName = "yunikorn-app"
-
 // Gang scheduling
 const PlaceholderContainerImage = "registry.k8s.io/pause:3.7"
 const PlaceholderContainerName = "pause"