Issue #2873648 by idebr, andregp, mfb, swentel: With many languages, content_translation_page_attachments adds too many alternate links to the response headers crashing varnish (503)

core/modules/content_translation/content_translation.module

@@ -714,7 +714,6 @@ function content_translation_page_attachments(&$page) {
             'hreflang' => $language->getId(),
             'href' => $url,
           ],
-          TRUE,
         ];
       }
     }