Merge pull request #6124 from backstage/rugvip/noroutes

plugins,dev-utils: remove usage of deprecated route registrations

plugins/welcome/dev/index.tsx

@@ -14,7 +14,14 @@
  * limitations under the License.
  */
 
+import React from 'react';
 import { createDevApp } from '@backstage/dev-utils';
-import { welcomePlugin } from '../src/plugin';
+import { welcomePlugin, WelcomePage } from '../src/plugin';
 
-createDevApp().registerPlugin(welcomePlugin).render();
+createDevApp()
+  .registerPlugin(welcomePlugin)
+  .addPage({
+    title: 'Welcome',
+    element: <WelcomePage />,
+  })
+  .render();

plugins/welcome/src/plugin.ts

@@ -19,7 +19,6 @@ import {
   createRoutableExtension,
   createRouteRef,
 } from '@backstage/core';
-import WelcomePageComponent from './components/WelcomePage';
 
 export const rootRouteRef = createRouteRef({
   title: 'Welcome',
@@ -27,8 +26,7 @@ export const rootRouteRef = createRouteRef({
 
 export const welcomePlugin = createPlugin({
   id: 'welcome',
-  register({ router, featureFlags }) {
-    router.addRoute(rootRouteRef, WelcomePageComponent);
+  register({ featureFlags }) {
     featureFlags.register('enable-welcome-box');
   },
 });