Remove StorageObjectInUseProtection feature gate logic

This feature has graduated to GA in v1.11 and will always be
enabled. So no longe need to check if enabled.

Signed-off-by: Konstantin Misyutin <konstantin.misyutin@huawei.com>

plugin/pkg/admission/storage/storageobjectinuseprotection/admission.go

@@ -21,11 +21,8 @@ import (
 	"io"
 
 	"k8s.io/apiserver/pkg/admission"
-	"k8s.io/apiserver/pkg/admission/initializer"
-	"k8s.io/component-base/featuregate"
 	"k8s.io/klog/v2"
 	api "k8s.io/kubernetes/pkg/apis/core"
-	"k8s.io/kubernetes/pkg/features"
 	volumeutil "k8s.io/kubernetes/pkg/volume/util"
 )
 
@@ -45,12 +42,9 @@ func Register(plugins *admission.Plugins) {
 // storageProtectionPlugin holds state for and implements the admission plugin.
 type storageProtectionPlugin struct {
 	*admission.Handler
-
-	storageObjectInUseProtection bool
 }
 
 var _ admission.Interface = &storageProtectionPlugin{}
-var _ initializer.WantsFeatures = &storageProtectionPlugin{}
 
 // newPlugin creates a new admission plugin.
 func newPlugin() *storageProtectionPlugin {
@@ -70,10 +64,6 @@ var (
 // This prevents users from deleting a PVC that's used by a running pod.
 // This also prevents admin from deleting a PV that's bound by a PVC
 func (c *storageProtectionPlugin) Admit(ctx context.Context, a admission.Attributes, o admission.ObjectInterfaces) error {
-	if !c.storageObjectInUseProtection {
-		return nil
-	}
-
 	switch a.GetResource().GroupResource() {
 	case pvResource:
 		return c.admitPV(a)
@@ -129,11 +119,3 @@ func (c *storageProtectionPlugin) admitPVC(a admission.Attributes) error {
 	pvc.Finalizers = append(pvc.Finalizers, volumeutil.PVCProtectionFinalizer)
 	return nil
 }
-
-func (c *storageProtectionPlugin) InspectFeatureGates(featureGates featuregate.FeatureGate) {
-	c.storageObjectInUseProtection = featureGates.Enabled(features.StorageObjectInUseProtection)
-}
-
-func (c *storageProtectionPlugin) ValidateInitialization() error {
-	return nil
-}

plugin/pkg/admission/storage/storageobjectinuseprotection/admission_test.go

@@ -61,7 +61,6 @@ func TestAdmit(t *testing.T) {
 		resource       schema.GroupVersionResource
 		object         runtime.Object
 		expectedObject runtime.Object
-		featureEnabled bool
 		namespace      string
 	}{
 		{
@@ -69,7 +68,6 @@ func TestAdmit(t *testing.T) {
 			api.SchemeGroupVersion.WithResource("persistentvolumeclaims"),
 			claim,
 			claimWithFinalizer,
-			true,
 			claim.Namespace,
 		},
 		{
@@ -77,23 +75,13 @@ func TestAdmit(t *testing.T) {
 			api.SchemeGroupVersion.WithResource("persistentvolumeclaims"),
 			claimWithFinalizer,
 			claimWithFinalizer,
-			true,
 			claimWithFinalizer.Namespace,
 		},
-		{
-			"disabled feature -> no finalizer",
-			api.SchemeGroupVersion.WithResource("persistentvolumeclaims"),
-			claim,
-			claim,
-			false,
-			claim.Namespace,
-		},
 		{
 			"create -> add finalizer",
 			api.SchemeGroupVersion.WithResource("persistentvolumes"),
 			pv,
 			pvWithFinalizer,
-			true,
 			pv.Namespace,
 		},
 		{
@@ -101,23 +89,13 @@ func TestAdmit(t *testing.T) {
 			api.SchemeGroupVersion.WithResource("persistentvolumes"),
 			pvWithFinalizer,
 			pvWithFinalizer,
-			true,
 			pvWithFinalizer.Namespace,
 		},
-		{
-			"disabled feature -> no finalizer",
-			api.SchemeGroupVersion.WithResource("persistentvolumes"),
-			pv,
-			pv,
-			false,
-			pv.Namespace,
-		},
 	}
 
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
 			ctrl := newPlugin()
-			ctrl.storageObjectInUseProtection = test.featureEnabled
 
 			obj := test.object.DeepCopyObject()
 			attrs := admission.NewAttributesRecord(