reverted:
--- b/core/themes/classy/templates/system/fieldset.html.twig
+++ a/core/themes/classy/templates/system/fieldset.html.twig
@@ -5,7 +5,6 @@
*
* Available variables:
* - attributes: HTML attributes for the fieldset element.
- * - errors: (optional) Any errors for this fieldset element, may not be set.
* - required: Boolean indicating whether the fieldeset element is required.
* - legend: The legend element containing the following properties:
* - title: Title of the fieldset, intended for use as the text of the legend.
@@ -22,19 +21,7 @@
* @ingroup themeable
*/
#}
+