Do not export registerComponentRouteRef and RegisterExistingButton

Signed-off-by: Min Kim <minkimcello@gmail.com>

plugins/scaffolder/src/alpha.ts

@@ -21,9 +21,6 @@ export {
   type TemplateGroupsProps,
   type NextRouterProps,
   type FormProps,
-  RegisterExistingButton,
-  type RegisterExistingButtonProps,
   type TemplateListPageProps,
   type TemplateWizardPageProps,
 } from './next';
-export { registerComponentRouteRef } from './routes';

plugins/scaffolder/src/next/TemplateListPage/index.ts

@@ -21,6 +21,3 @@ export type {
   TemplateGroupFilter,
   TemplateGroupsProps,
 } from './TemplateGroups';
-
-export { RegisterExistingButton } from './RegisterExistingButton';
-export type { RegisterExistingButtonProps } from './RegisterExistingButton';

plugins/scaffolder/src/routes.ts

@@ -19,9 +19,6 @@ import {
   createSubRouteRef,
 } from '@backstage/core-plugin-api';
 
-/**
- * @public
- */
 export const registerComponentRouteRef = createExternalRouteRef({
   id: 'register-component',
   optional: true,