delete old auto-update script

core/scripts/auto-update

-#!/usr/bin/env php
-<?php
-
-/**
- * @file
- * Provides a terminal command for performing automatic updates.
- */
-
-use Drupal\auto_updates\Commands\PostApplyCommand;
-use Drupal\auto_updates\Commands\RunCommand;
-use Symfony\Component\Console\Application;
-
-if (PHP_SAPI !== 'cli') {
-  throw new \RuntimeException('This command must be run from the command line.');
-}
-
-// Find the autoloader. We know that Automatic Updates is installed somewhere
-// in a Drupal code base, so move up the file system until we find
-// `./vendor/autoload.php`.
-$current_dir = __DIR__;
-$previous_dir = NULL;
-while ($current_dir !== $previous_dir) {
-  $file = $current_dir . '/vendor/autoload.php';
-  if (file_exists($file)) {
-    /** @var \Composer\Autoload\ClassLoader $autoloader */
-    $autoloader = require_once $file;
-    break;
-  }
-  $previous_dir = $current_dir;
-  $current_dir = dirname($current_dir);
-}
-
-if (empty($autoloader)) {
-  throw new \RuntimeException('The autoloader could not be found. Did you run `composer install`?');
-}
-
-// Automatic Updates' namespace is not available for autoloading because it is
-// a Drupal module, which means Drupal must be booted up in order to access it.
-// Since Drupal isn't booted yet, we need to make the autoloader aware of the
-// command namespace.
-$autoloader->addPsr4('Drupal\\auto_updates\\Commands\\', __DIR__ . '/src/Commands');
-
-$application = new Application('Automatic Updates', '3.0.0');
-$application->add(new RunCommand($autoloader));
-$application->add(new PostApplyCommand($autoloader));
-$application->setDefaultCommand('run')->run();