core-app-api: stop exporting AppTranslationApi implementation

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/core-app-api/alpha-api-report.md

@@ -1,36 +0,0 @@
-## API Report File for "@backstage/core-app-api"
-
-> Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
-
-```ts
-import { AppTranslationApi } from '@backstage/core-plugin-api/alpha';
-import { i18n } from 'i18next';
-import { TranslationMessages } from '@backstage/core-plugin-api/alpha';
-import { TranslationRef } from '@backstage/core-plugin-api/alpha';
-import { TranslationResource } from '@backstage/core-plugin-api/alpha';
-
-// @alpha (undocumented)
-export class AppTranslationApiImpl implements AppTranslationApi {
-  // (undocumented)
-  addLazyResources(resource: TranslationResource): void;
-  // (undocumented)
-  addMessages(messages: TranslationMessages): void;
-  // (undocumented)
-  addResource(translationRef: TranslationRef): void;
-  // (undocumented)
-  static create(options?: ExperimentalI18n): AppTranslationApiImpl;
-  // (undocumented)
-  getI18n(): i18n;
-  // (undocumented)
-  initMessages(options?: ExperimentalI18n): void;
-}
-
-// @alpha (undocumented)
-export type ExperimentalI18n = {
-  fallbackLanguage?: string | string[];
-  supportedLanguages?: string[];
-  resources?: Array<TranslationMessages | TranslationResource>;
-};
-
-// (No @packageDocumentation comment for this package)
-```

packages/core-app-api/package.json

@@ -7,14 +7,10 @@
   },
   "exports": {
     ".": "./src/index.ts",
-    "./alpha": "./src/alpha.ts",
     "./package.json": "./package.json"
   },
   "typesVersions": {
     "*": {
-      "alpha": [
-        "src/alpha.ts"
-      ],
       "package.json": [
         "package.json"
       ]

packages/core-app-api/src/alpha.ts

@@ -1,16 +0,0 @@
-/*
- * Copyright 2023 The Backstage Authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-export * from './apis/implementations/AppTranslationApi';