Remove unused field from APIGroupVersion

RootScopedKinds is only present in unit tests, and
is not referenced anywhere else.

Kubernetes-commit: 90c49ab2eda2f786d143117f6f2133f1fa90af34

pkg/endpoints/apiserver_test.go

@@ -237,7 +237,6 @@ func handleInternal(storage map[string]rest.Storage, admissionControl admission.
 		Defaulter:       scheme,
 		Typer:           scheme,
 		Namer:           namer,
-		RootScopedKinds: sets.NewString("SimpleRoot"),
 
 		EquivalentResourceRegistry: runtime.NewEquivalentResourceRegistry(),
 
@@ -3311,7 +3310,6 @@ func TestParentResourceIsRequired(t *testing.T) {
 		Defaulter:       scheme,
 		Typer:           scheme,
 		Namer:           namer,
-		RootScopedKinds: sets.NewString("SimpleRoot"),
 
 		EquivalentResourceRegistry: runtime.NewEquivalentResourceRegistry(),
 

pkg/endpoints/groupversion.go

@@ -28,7 +28,6 @@ import (
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	"k8s.io/apimachinery/pkg/util/managedfields"
-	"k8s.io/apimachinery/pkg/util/sets"
 	"k8s.io/apiserver/pkg/admission"
 	"k8s.io/apiserver/pkg/authorization/authorizer"
 	"k8s.io/apiserver/pkg/endpoints/discovery"
@@ -71,9 +70,6 @@ type APIGroupVersion struct {
 	// version (for when the inevitable meta/v2 group emerges).
 	MetaGroupVersion *schema.GroupVersion
 
-	// RootScopedKinds are the root scoped kinds for the primary GroupVersion
-	RootScopedKinds sets.String
-
 	// Serializer is used to determine how to convert responses from API methods into bytes to send over
 	// the wire.
 	Serializer     runtime.NegotiatedSerializer