Revert "ISTWCMS-4631: Create UWService::userIsAdmin()"

This reverts commit 9b5d77cf.

src/Service/UWService.php

@@ -5,7 +5,6 @@ namespace Drupal\uw_cfg_common\Service;
 use Drupal\Core\Database\Connection;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\EntityTypeManagerInterface;
-use Drupal\Core\Session\AccountInterface;
 use Drupal\node\NodeInterface;
 use Drupal\simplify_menu\MenuItems;
 
@@ -418,24 +417,4 @@ class UWService implements UWServiceInterface {
     }
   }
 
-  /**
-   * Determine whether the user is in an administrator group.
-   *
-   * @param \Drupal\Core\Session\AccountInterface $user
-   *   The user object.
-   *
-   * @return bool
-   *   TRUE if the user is in an administrator group, FALSE otherwise.
-   */
-  public static function userIsAdmin(AccountInterface $user): bool {
-    $user_roles = $user->getRoles();
-
-    // Based on core/modules/user/src/AccountSettingsForm.php.
-    $admin_roles = \Drupal::service('entity_type.manager')->getStorage('user_role')->getQuery()
-      ->condition('is_admin', TRUE)
-      ->execute();
-
-    return (bool) array_intersect($user_roles, $admin_roles);
-  }
-
 }