$attached_options = $executable->displayHandlers->get($attachment)->getOption('displays');
unset($attached_options[$id]);
$executable->displayHandlers->get($attachment)->setOption('displays', $attached_options);
$attached_options = $executable->displayHandlers->get($attachment)->getOption('displays');
unset($attached_options[$id]);
$executable->displayHandlers->get($attachment)->setOption('displays', $attached_options);