remove most usages of node-fetch

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

plugins/proxy-backend/src/service/router.config.test.ts

@@ -29,7 +29,6 @@ import {
 } from '@backstage/config-loader';
 import { HttpResponse, http, passthrough } from 'msw';
 import { setupServer } from 'msw/node';
-import fetch from 'node-fetch';
 
 // this test is stored in its own file to work around the mocked
 // http-proxy-middleware module used in the main test file

plugins/proxy-backend/src/service/router.credentials.test.ts

@@ -25,7 +25,6 @@ import { ResponseError } from '@backstage/errors';
 import { JsonObject } from '@backstage/types';
 import { HttpResponse, http, passthrough } from 'msw';
 import { setupServer } from 'msw/node';
-import fetch from 'node-fetch';
 
 // this test is stored in its own file to work around the mocked
 // http-proxy-middleware module used in the main test file