remove most usages of node-fetch

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

plugins/notifications-node/package.json

@@ -43,7 +43,6 @@
     "@backstage/plugin-notifications-common": "workspace:^",
     "@backstage/plugin-signals-node": "workspace:^",
     "knex": "^3.0.0",
-    "node-fetch": "^2.7.0",
     "uuid": "^11.0.0"
   },
   "devDependencies": {

plugins/notifications-node/src/service/DefaultNotificationService.ts

@@ -17,7 +17,6 @@
 import { NotificationService } from './NotificationService';
 import { AuthService, DiscoveryService } from '@backstage/backend-plugin-api';
 import { NotificationPayload } from '@backstage/plugin-notifications-common';
-import fetch from 'node-fetch';
 
 /** @public */
 export type NotificationServiceOptions = {