docs(docs-infra): remove polyfills.ts (#50409)

We can use the angular.json directly.

PR Close #50409

aio/angular.json

@@ -36,7 +36,7 @@
             "outputPath": "dist",
             "index": "src/index.html",
             "main": "src/main.ts",
-            "polyfills": "src/polyfills.ts",
+            "polyfills": ["zone.js"],
             "ngswConfigPath": "src/generated/ngsw-config.json",
             "tsConfig": "tsconfig.app.json",
             "webWorkerTsConfig": "tsconfig.worker.json",
@@ -216,7 +216,7 @@
           "builder": "@angular-devkit/build-angular:karma",
           "options": {
             "main": "src/test.ts",
-            "polyfills": "src/polyfills.ts",
+            "polyfills": ["zone.js", "zone.js/testing"],
             "tsConfig": "tsconfig.spec.json",
             "webWorkerTsConfig": "tsconfig.worker.json",
             "karmaConfig": "karma.conf.js",

aio/src/polyfills.ts

@@ -1,53 +0,0 @@
-/**
- * This file includes polyfills needed by Angular and is loaded before the app.
- * You can add your own extra polyfills to this file.
- *
- * This file is divided into 2 sections:
- *   1. Browser polyfills. These are applied before loading ZoneJS and are sorted by browsers.
- *   2. Application imports. Files imported after ZoneJS that should be loaded before your main
- *      file.
- *
- * The current setup is for so-called "evergreen" browsers; the last versions of browsers that
- * automatically update themselves. This includes Safari >= 10, Chrome >= 55 (including Opera),
- * Edge >= 13 on the desktop, and iOS 10 and Chrome on mobile.
- *
- * Learn more in https://angular.io/guide/browser-support
- */
-
-/***************************************************************************************************
- * BROWSER POLYFILLS
- */
-
-/**
- * By default, zone.js will patch all possible macroTask and DomEvents
- * user can disable parts of macroTask/DomEvents patch by setting following flags
- * because those flags need to be set before `zone.js` being loaded, and webpack
- * will put import in the top of bundle, so user need to create a separate file
- * in this directory (for example: zone-flags.ts), and put the following flags
- * into that file, and then add the following code before importing zone.js.
- * import './zone-flags';
- *
- * The flags allowed in zone-flags.ts are listed here.
- *
- * The following flags will work for all browsers.
- *
- * (window as any).__Zone_disable_requestAnimationFrame = true; // disable patch requestAnimationFrame
- * (window as any).__Zone_disable_on_property = true; // disable patch onProperty such as onclick
- * (window as any).__zone_symbol__UNPATCHED_EVENTS = ['scroll', 'mousemove']; // disable patch specified eventNames
- *
- *  in IE/Edge developer tools, the addEventListener will also be wrapped by zone.js
- *  with the following flag, it will bypass `zone.js` patch for IE/Edge
- *
- *  (window as any).__Zone_enable_cross_context_check = true;
- *
- */
-
-/***************************************************************************************************
- * Zone JS is required by default for Angular itself.
- */
-import 'zone.js';  // Included with Angular CLI.
-
-
-/***************************************************************************************************
- * APPLICATION IMPORTS
- */

aio/tsconfig.app.json

@@ -14,7 +14,6 @@
   },
   "files": [
     "src/main.ts",
-    "src/polyfills.ts"
   ],
   "include": [
     "src/**/*.d.ts"

aio/tsconfig.spec.json

@@ -9,7 +9,6 @@
   },
   "files": [
     "src/test.ts",
-    "src/polyfills.ts"
   ],
   "include": [
     "src/testing/**/*.ts",