diff --git a/core/modules/system/css/system.theme.css b/core/modules/system/css/system.theme.css
index e5af9712f46d6bc4243d6f965030757b8ecd3d06..6b3453838b4956988b63f938e3e0bca748d013b9 100644
--- a/core/modules/system/css/system.theme.css
+++ b/core/modules/system/css/system.theme.css
@@ -99,13 +99,6 @@ abbr.form-required, abbr.tabledrag-changed, abbr.ajax-changed {
   margin-left: 0;
   margin-right: 0;
 }
-fieldset.fieldset-no-border {
-  border: none;
-  padding: 0;
-}
-fieldset.fieldset-no-border legend {
-  text-transform: none;
-}
 
 /**
  * Inline items.