Issue #3247479: Allow LockFileValidator results to carry multiple messages, and improve their text

package_manager/tests/src/Kernel/PackageManagerKernelTestBase.php

@@ -279,18 +279,6 @@ abstract class PackageManagerKernelTestBase extends KernelTestBase {
     $this->container->set('package_manager.validator.disk_space', $validator);
   }
 
-  /**
-   * Copies a fixture directory into the active directory.
-   *
-   * @param string $active_fixture_dir
-   *   Path to fixture active directory from which the files will be copied.
-   */
-  protected function copyFixtureFolderToActiveDirectory(string $active_fixture_dir) {
-    $active_dir = $this->container->get('package_manager.path_locator')
-      ->getProjectRoot();
-    static::copyFixtureFilesTo($active_fixture_dir, $active_dir);
-  }
-
   /**
    * Sets the current (running) version of core, as known to the Update module.
    *