fix: test failures & warnings

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

@@ -15,8 +15,8 @@
  */
 
 import { buildMiddleware, createRouter } from './router';
-import * as winston from 'winston';
 import {
+  getVoidLogger,
   loadBackendConfig,
   SingleHostDiscovery,
 } from '@backstage/backend-common';
@@ -40,7 +40,7 @@ const mockCreateProxyMiddleware = createProxyMiddleware as jest.MockedFunction<
 
 describe('createRouter', () => {
   it('works', async () => {
-    const logger = winston.createLogger();
+    const logger = getVoidLogger();
     const config = await loadBackendConfig({ logger, argv: [] });
     const discovery = SingleHostDiscovery.fromConfig(config);
     const router = await createRouter({
@@ -53,7 +53,7 @@ describe('createRouter', () => {
 });
 
 describe('buildMiddleware', () => {
-  const logger = winston.createLogger();
+  const logger = getVoidLogger();
 
   beforeEach(() => {
     mockCreateProxyMiddleware.mockClear();