Remove Array.prototype.includes polyfill (#24234)

app/javascript/mastodon/base_polyfills.js

@@ -1,16 +1,11 @@
 import 'intl';
 import 'intl/locale-data/jsonp/en';
 import 'es6-symbol/implement';
-import includes from 'array-includes';
 import assign from 'object-assign';
 import values from 'object.values';
 import { decode as decodeBase64 } from './utils/base64';
 import promiseFinally from 'promise.prototype.finally';
 
-if (!Array.prototype.includes) {
-  includes.shim();
-}
-
 if (!Object.assign) {
   Object.assign = assign;
 }

app/javascript/mastodon/load_polyfills.js

@@ -12,7 +12,6 @@ function importExtraPolyfills() {
 
 function loadPolyfills() {
   const needsBasePolyfills = !(
-    Array.prototype.includes &&
     HTMLCanvasElement.prototype.toBlob &&
     window.Intl &&
     Object.assign &&

package.json

@@ -38,7 +38,6 @@
     "@github/webauthn-json": "^2.1.1",
     "@rails/ujs": "^6.1.7",
     "abortcontroller-polyfill": "^1.7.5",
-    "array-includes": "^3.1.6",
     "arrow-key-navigation": "^1.2.0",
     "autoprefixer": "^10.4.14",
     "axios": "^1.3.4",