Remove orhapn UPDATE validation

Longhorn 6246

Signed-off-by: Derek Su <derek.su@suse.com>

webhook/resources/orphan/validator.go

@@ -2,7 +2,6 @@ package orphan
 
 import (
 	"fmt"
-	"reflect"
 
 	admissionregv1 "k8s.io/api/admissionregistration/v1"
 	"k8s.io/apimachinery/pkg/runtime"
@@ -31,7 +30,6 @@ func (o *orphanValidator) Resource() admission.Resource {
 		ObjectType: &longhorn.Orphan{},
 		OperationTypes: []admissionregv1.OperationType{
 			admissionregv1.Create,
-			admissionregv1.Update,
 		},
 	}
 }
@@ -53,30 +51,6 @@ func (o *orphanValidator) Create(request *admission.Request, newObj runtime.Obje
 	return nil
 }
 
-func (o *orphanValidator) Update(request *admission.Request, oldObj runtime.Object, newObj runtime.Object) error {
-	oldOrphan := oldObj.(*longhorn.Orphan)
-	newOrphan := newObj.(*longhorn.Orphan)
-
-	if err := checkOrphanParameters(newOrphan); err != nil {
-		return werror.NewInvalidError(err.Error(), "")
-	}
-
-	if !reflect.DeepEqual(oldOrphan.Spec, newOrphan.Spec) {
-		return werror.NewInvalidError(fmt.Sprintf("orphan %v spec fields are immutable", oldOrphan.Name), "")
-	}
-
-	return nil
-}
-
-func checkOrphanParameters(orphan *longhorn.Orphan) error {
-	switch {
-	case orphan.Spec.Type == longhorn.OrphanTypeReplica:
-		return checkOrphanForReplicaDirectory(orphan)
-	}
-
-	return werror.NewInvalidError(fmt.Sprintf("unknown orphan type %v for orphan %v", orphan.Spec.Type, orphan.Name), "")
-}
-
 func checkOrphanForReplicaDirectory(orphan *longhorn.Orphan) error {
 	params := []string{
 		longhorn.OrphanDataName,