Issue #3114195 by longwave: Remove deprecated configDirectories property from...

Issue #3114195 by longwave: Remove deprecated configDirectories property from FunctionalTestSetupTrait

core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php

@@ -46,16 +46,6 @@ trait FunctionalTestSetupTrait {
    */
   protected $classLoader;
 
-  /**
-   * The config directories used in this test.
-   *
-   * @deprecated in drupal:8.8.0 and is removed from drupal:9.0.0. Use
-   *   \Drupal\Core\Site\Settings::get('config_sync_directory') instead.
-   *
-   * @see https://www.drupal.org/node/3018145
-   */
-  protected $configDirectories = [];
-
   /**
    * The flag to set 'apcu_ensure_unique_prefix' setting.
    *
@@ -301,7 +291,6 @@ protected function doInstall() {
    */
   protected function initSettings() {
     Settings::initialize(DRUPAL_ROOT, $this->siteDirectory, $this->classLoader);
-    $this->configDirectories['sync'] = Settings::get('config_sync_directory');
 
     // After writing settings.php, the installer removes write permissions
     // from the site directory. To allow drupal_generate_test_ua() to write

core/tests/Drupal/FunctionalTests/Installer/InstallerTestBase.php

@@ -171,7 +171,6 @@ protected function setUp() {
       $request = Request::createFromGlobals();
       $class_loader = require $this->container->get('app.root') . '/autoload.php';
       Settings::initialize($this->container->get('app.root'), DrupalKernel::findSitePath($request), $class_loader);
-      $this->configDirectories['sync'] = Settings::get('config_sync_directory');
 
       // After writing settings.php, the installer removes write permissions
       // from the site directory. To allow drupal_generate_test_ua() to write