Remove knexfile.js from tech-insights-backend

Signed-off-by: Tomasz Szuba <tszuba@box.com>

plugins/tech-insights-backend/knexfile.js

@@ -1,26 +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.
- */
-
-// This file makes it possible to run "yarn knex migrate:make some_file_name"
-// to assist in making new migrations
-module.exports = {
-  client: 'better-sqlite3',
-  connection: ':memory:',
-  useNullAsDefault: true,
-  migrations: {
-    directory: './migrations',
-  },
-};