Issue #3230507: Create build tests for case where site is using core recommended Composer project

tests/src/Build/AttendedUpdateTestBase.php

@@ -4,7 +4,6 @@ namespace Drupal\Tests\automatic_updates\Build;
 
 use Drupal\BuildTests\QuickStart\QuickStartTestBase;
 use Drupal\Component\Utility\Html;
-use Drupal\Component\Utility\NestedArray;
 use Drupal\Tests\automatic_updates\Traits\LocalPackagesTrait;
 use Drupal\Tests\automatic_updates\Traits\SettingsTrait;
 
@@ -138,21 +137,6 @@ END;
     $this->addSettings($php, $this->getDocRoot());
   }
 
-  /**
-   * Alters a package's composer.json file.
-   *
-   * @param string $package_dir
-   *   The package directory.
-   * @param array $changes
-   *   The changes to merge into composer.json.
-   */
-  protected function alterPackage(string $package_dir, array $changes): void {
-    $composer = $package_dir . DIRECTORY_SEPARATOR . 'composer.json';
-    $data = $this->readJson($composer);
-    $data = NestedArray::mergeDeep($data, $changes);
-    $this->writeJson($composer, $data);
-  }
-
   /**
    * Uses our already-installed dependencies to build a test site to update.
    */