Removes owner checks from extension controller reconciliations (garde…

…ner#6973)

* Removes owner checks from extension reconcilatiations

* Removes unused owner check code

extensions/pkg/controller/backupentry/reconciler.go

@@ -19,7 +19,6 @@ import (
 	"fmt"
 
 	extensionscontroller "github.com/gardener/gardener/extensions/pkg/controller"
-	"github.com/gardener/gardener/extensions/pkg/controller/common"
 	gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
 	v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
 	gardencorev1beta1helper "github.com/gardener/gardener/pkg/apis/core/v1beta1/helper"
@@ -99,20 +98,6 @@ func (r *reconciler) Reconcile(ctx context.Context, request reconcile.Request) (
 
 	operationType := gardencorev1beta1helper.ComputeOperationType(be.ObjectMeta, be.Status.LastOperation)
 
-	if cluster != nil && cluster.Shoot != nil && operationType != gardencorev1beta1.LastOperationTypeMigrate {
-		key := "backupentry:" + be.Name
-		ok, watchdogCtx, cleanup, err := common.GetOwnerCheckResultAndContext(ctx, r.client, shootTechnicalID, cluster.Shoot.Name, key)
-		if err != nil {
-			return reconcile.Result{}, err
-		} else if !ok {
-			return reconcile.Result{}, fmt.Errorf("this seed is not the owner of shoot %s", kutil.ObjectName(cluster.Shoot))
-		}
-		ctx = watchdogCtx
-		if cleanup != nil {
-			defer cleanup()
-		}
-	}
-
 	switch {
 	case extensionscontroller.ShouldSkipOperation(operationType, be):
 		return reconcile.Result{}, nil

extensions/pkg/controller/cluster.go

@@ -30,8 +30,6 @@ var (
 	ShootFromCluster = extensions.ShootFromCluster
 	// GetShoot tries to read Gardener's Cluster extension resource in the given namespace and return the embedded Shoot resource.
 	GetShoot = extensions.GetShoot
-	// GetOwnerNameAndID reads the owner DNS name and ID from the owner DNSRecord extension resource in the given namespace.
-	GetOwnerNameAndID = extensions.GetOwnerNameAndID
 	// GenericTokenKubeconfigSecretNameFromCluster reads the generic-token-kubeconfig.secret.gardener.cloud/name annotation
 	// and returns its value. If the annotation is not present then it falls back to the deprecated
 	// SecretNameGenericTokenKubeconfig.