Remove EndpointSliceNodeName feature gate logic

- feature gate has graduated to GA and will always be enabled, so no
 longer need to check if enabled

pkg/controller/endpointslicemirroring/utils.go

@@ -27,12 +27,10 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
-	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	"k8s.io/client-go/tools/cache"
 	"k8s.io/client-go/tools/leaderelection/resourcelock"
 	"k8s.io/kubernetes/pkg/apis/discovery/validation"
 	endpointutil "k8s.io/kubernetes/pkg/controller/util/endpoint"
-	"k8s.io/kubernetes/pkg/features"
 )
 
 // addrTypePortMapKey is used to uniquely identify groups of endpoint ports and
@@ -140,9 +138,7 @@ func addressToEndpoint(address corev1.EndpointAddress, ready bool) *discovery.En
 		endpoint.Topology = map[string]string{
 			"kubernetes.io/hostname": *address.NodeName,
 		}
-		if utilfeature.DefaultFeatureGate.Enabled(features.EndpointSliceNodeName) {
-			endpoint.NodeName = address.NodeName
-		}
+		endpoint.NodeName = address.NodeName
 	}
 	if address.Hostname != "" {
 		endpoint.Hostname = &address.Hostname