Remove unused checkForGitChanges script (#49099)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/49099

Changelog: [Internal]

Reviewed By: EdmondChuiHW

Differential Revision: D68960652

fbshipit-source-id: 138e83dfedef7ea717502a1e964eb802dae678c4

scripts/monorepo/check-for-git-changes.js

@@ -1,39 +0,0 @@
-/**
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @format
- */
-
-const {spawnSync} = require('child_process');
-const path = require('path');
-
-const ROOT_LOCATION = path.join(__dirname, '..', '..');
-
-const checkForGitChanges = () => {
-  const {stdout: thereIsSomethingToCommit, stderr} = spawnSync(
-    'git',
-    ['status', '--porcelain'],
-    {
-      cwd: ROOT_LOCATION,
-      shell: true,
-      stdio: 'pipe',
-      encoding: 'utf-8',
-    },
-  );
-
-  if (stderr) {
-    console.log(
-      '\u274c An error occured while running `git status --porcelain`:',
-    );
-    console.log(stderr);
-
-    process.exit(1);
-  }
-
-  return Boolean(thereIsSomethingToCommit);
-};
-
-module.exports = checkForGitChanges;