remove the alpha export of the plugin

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

.changeset/chatty-showers-cheat.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-catalog-backend': minor
+---
+
+**BREAKING ALPHA**: You can no longer import the catalog plugin from the `/alpha` export; please use the regular root default export instead.

plugins/catalog-backend/dev/index.ts

@@ -17,5 +17,5 @@
 import { createBackend } from '@backstage/backend-defaults';
 
 const backend = createBackend();
-backend.add(import('../src/alpha'));
+backend.add(import('../src'));
 backend.start();

plugins/catalog-backend/report-alpha.api.md

@@ -3,7 +3,6 @@
 > Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
 
 ```ts
-import { BackendFeature } from '@backstage/backend-plugin-api';
 import { ConditionalPolicyDecision } from '@backstage/plugin-permission-common';
 import { Conditions } from '@backstage/plugin-permission-node';
 import { EntitiesSearchFilter } from '@backstage/plugin-catalog-node';
@@ -87,10 +86,6 @@ export const createCatalogPermissionRule: <
   rule: PermissionRule<Entity, EntitiesSearchFilter, 'catalog-entity', TParams>,
 ) => PermissionRule<Entity, EntitiesSearchFilter, 'catalog-entity', TParams>;
 
-// @alpha (undocumented)
-const _feature: BackendFeature;
-export default _feature;
-
 // @alpha
 export const permissionRules: {
   hasAnnotation: PermissionRule<

plugins/catalog-backend/src/alpha.ts

@@ -14,10 +14,4 @@
  * limitations under the License.
  */
 
-import { catalogPlugin } from './service/CatalogPlugin';
-
-/** @alpha */
-const _feature = catalogPlugin;
-export default _feature;
-
 export * from './permissions';