Remove runtime.Typer, reduce to ObjectKinds(1) (3)

Remove the unnecessary variants, which avoids allocations in several
core paths.

pkg/kubectl/cmd/create.go

@@ -225,7 +225,11 @@ func RunCreateSubcommand(f *cmdutil.Factory, cmd *cobra.Command, out io.Writer,
 		return err
 	}
 	mapper, typer := f.Object(cmdutil.GetIncludeThirdPartyAPIs(cmd))
-	gvk, err := typer.ObjectKind(obj)
+	gvks, _, err := typer.ObjectKinds(obj)
+	if err != nil {
+		return err
+	}
+	gvk := gvks[0]
 	mapping, err := mapper.RESTMapping(unversioned.GroupKind{Group: gvk.Group, Kind: gvk.Kind}, gvk.Version)
 	if err != nil {
 		return err