.../EventSubscriber/DefaultExceptionSubscriber.php | 28 ----------------------
 1 file changed, 28 deletions(-)

diff --git a/core/lib/Drupal/Core/EventSubscriber/DefaultExceptionSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/DefaultExceptionSubscriber.php
index 836b667..3ae147d 100644
--- a/core/lib/Drupal/Core/EventSubscriber/DefaultExceptionSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/DefaultExceptionSubscriber.php
@@ -133,34 +133,6 @@ protected function onHtml(GetResponseForExceptionEvent $event) {
   }
 
   /**
-   * Handles any exception as a generic error page for JSON.
-   *
-   * @todo This should probably check the error reporting level.
-   *
-   * @param \Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event
-   *   The event to process.
-   */
-  protected function onJson(GetResponseForExceptionEvent $event) {
-    $exception = $event->getException();
-    $error = Error::decodeException($exception);
-
-    // Display the message if the current error reporting level allows this type
-    // of message to be displayed,
-    $data = NULL;
-    if (error_displayable($error) && $message = $exception->getMessage()) {
-      $data = ['message' => sprintf('A fatal error occurred: %s', $message)];
-    }
-
-    $response = new JsonResponse($data, Response::HTTP_INTERNAL_SERVER_ERROR);
-    if ($exception instanceof HttpExceptionInterface) {
-      $response->setStatusCode($exception->getStatusCode());
-      $response->headers->add($exception->getHeaders());
-    }
-
-    $event->setResponse($response);
-  }
-
-  /**
    * Handles an HttpExceptionInterface exception for unknown formats.
    *
    * @param \Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event