Remove jsdom-fourteen

Author: ianschmitz

packages/react-scripts/package.json

@@ -56,7 +56,6 @@
     "html-webpack-plugin": "4.3.0",
     "identity-obj-proxy": "3.0.0",
     "jest": "25.5.4",
-    "jest-environment-jsdom-fourteen": "1.0.1",
     "jest-resolve": "25.5.1",
     "jest-watch-typeahead": "0.5.0",
     "mini-css-extract-plugin": "0.9.0",

packages/react-scripts/scripts/utils/createJestConfig.js

@@ -38,9 +38,7 @@ module.exports = (resolve, rootDir, isEjecting) => {
       '<rootDir>/src/**/__tests__/**/*.{js,jsx,ts,tsx}',
       '<rootDir>/src/**/*.{spec,test}.{js,jsx,ts,tsx}',
     ],
-    // TODO: This doesn't actually do anything currently as the test script explicitly specifies the env.
-    // See https://github.com/facebook/create-react-app/issues/7491
-    testEnvironment: 'jest-environment-jsdom-fourteen',
+    testEnvironment: 'jsdom',
     transform: {
       '^.+\\.(js|jsx|mjs|cjs|ts|tsx)$': isEjecting
         ? '<rootDir>/node_modules/babel-jest'