remove not needed test dependencies

Signed-off-by: Katharina Sick <katharina.sick@dynatrace.com>

plugins/auth-backend/src/providers/bitbucketServer/provider.test.ts

@@ -15,7 +15,7 @@
  */
 
 import * as helpers from '../../lib/passport/PassportStrategyHelper';
-import { makeProfileInfo } from '../../lib/passport/PassportStrategyHelper';
+import { makeProfileInfo } from '../../lib/passport';
 import { AuthResolverContext } from '../types';
 import {
   bitbucketServer,
@@ -24,10 +24,9 @@ import {
 } from './provider';
 import { setupServer } from 'msw/node';
 import { setupRequestMockHandlers } from '@backstage/test-utils';
-import { fetch } from 'cross-fetch';
 import { rest } from 'msw';
 
-global.fetch = fetch;
+global.fetch = require('node-fetch');
 
 jest.mock('../../lib/passport/PassportStrategyHelper', () => {
   return {

plugins/auth-backend/src/setupTests.ts

@@ -14,5 +14,4 @@
  * limitations under the License.
  */
 
-import '@testing-library/jest-dom';
-import 'cross-fetch/polyfill';
+export {};