Issue #3444184 by mondrake: Remove dead KernelTestBase::stop() method

core/tests/Drupal/KernelTests/KernelTestBase.php

@@ -988,13 +988,6 @@ protected function setInstallProfile($profile) {
     $this->container->get('kernel')->rebuildContainer();
   }
 
-  /**
-   * Stops test execution.
-   */
-  protected function stop() {
-    $this->getTestResultObject()->stop();
-  }
-
   /**
    * Dumps the current state of the virtual filesystem to STDOUT.
    */