Remove EphemeralContainers feature-gate checks

pkg/volume/util/util_test.go

@@ -28,10 +28,7 @@ import (
 	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/util/sets"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
-	featuregatetesting "k8s.io/component-base/featuregate/testing"
 	_ "k8s.io/kubernetes/pkg/apis/core/install"
-	"k8s.io/kubernetes/pkg/features"
 	"k8s.io/kubernetes/pkg/util/slice"
 	"k8s.io/kubernetes/pkg/volume"
 	utilptr "k8s.io/utils/pointer"
@@ -581,7 +578,6 @@ func TestMakeAbsolutePath(t *testing.T) {
 }
 
 func TestGetPodVolumeNames(t *testing.T) {
-	defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.EphemeralContainers, true)()
 	tests := []struct {
 		name            string
 		pod             *v1.Pod