Remove react-dev-utils crossSpawn package

This yarn package had no purpose since it
is just an import of the `cross-spawn` npm package.

Author: evaporei

packages/react-dev-utils/crossSpawn.js

@@ -14,7 +14,6 @@
     "browsersHelper.js",
     "checkRequiredFiles.js",
     "clearConsole.js",
-    "crossSpawn.js",
     "errorOverlayMiddleware.js",
     "eslintFormatter.js",
     "evalSourceMapMiddleware.js",

packages/react-dev-utils/package.json

@@ -15,7 +15,7 @@ process.on('unhandledRejection', err => {
   throw err;
 });
 
-const spawn = require('react-dev-utils/crossSpawn');
+const spawn = require('cross-spawn');
 const args = process.argv.slice(2);
 
 const scriptIndex = args.findIndex(

packages/react-scripts/bin/react-scripts.js

@@ -21,7 +21,7 @@ const chalk = require('chalk');
 const paths = require('../config/paths');
 const createJestConfig = require('./utils/createJestConfig');
 const inquirer = require('react-dev-utils/inquirer');
-const spawnSync = require('react-dev-utils/crossSpawn').sync;
+const spawnSync = require('cross-spawn').sync;
 const os = require('os');
 
 const green = chalk.green;

packages/react-scripts/scripts/eject.js

@@ -18,7 +18,7 @@ const fs = require('fs-extra');
 const path = require('path');
 const chalk = require('chalk');
 const execSync = require('child_process').execSync;
-const spawn = require('react-dev-utils/crossSpawn');
+const spawn = require('cross-spawn');
 const { defaultBrowsers } = require('react-dev-utils/browsersHelper');
 const os = require('os');