diff --git a/core/includes/form.inc b/core/includes/form.inc
index bd6d352..b8d111a 100644
--- a/core/includes/form.inc
+++ b/core/includes/form.inc
@@ -1115,33 +1115,6 @@ function form_pre_render_radio($element) {
 }
 
 /**
- * Prepares variables for radios templates.
- *
- * Default template: radios.html.twig.
- *
- * @param array $variables
- *   An associative array containing:
- *   - element: An associative array containing the properties of the element.
- *     Properties used: #title, #value, #options, #description, #required,
- *     #attributes, #children.
- */
-function template_preprocess_radios(&$variables) {
-  $element = $variables['element'];
-  $variables['attributes'] = array();
-  if (isset($element['#id'])) {
-    $variables['attributes']['id'] = $element['#id'];
-  }
-  $variables['attributes']['class'][] = 'form-radios';
-  if (!empty($element['#attributes']['class'])) {
-    $variables['attributes']['class'] = array_merge($variables['attributes']['class'], $element['#attributes']['class']);
-  }
-  if (isset($element['#attributes']['title'])) {
-    $variables['attributes']['title'] = $element['#attributes']['title'];
-  }
-  $variables['children'] = $element['#children'];
-}
-
-/**
  * Expand a password_confirm field into two text boxes.
  */
 function form_process_password_confirm($element) {
diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index d719b5a..6b8b649 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -458,7 +458,7 @@ function system_element_info() {
   $types['radios'] = array(
     '#input' => TRUE,
     '#process' => array('form_process_radios'),
-    '#theme_wrappers' => array('radios'),
+    '#theme_wrappers' => array('container'),
     '#pre_render' => array('form_pre_render_conditional_form_element'),
   );
   $types['radio'] = array(
diff --git a/core/modules/system/templates/radios.html.twig b/core/modules/system/templates/radios.html.twig
deleted file mode 100644
index e397644..0000000
--- a/core/modules/system/templates/radios.html.twig
+++ /dev/null
@@ -1,15 +0,0 @@
-{#
-/**
- * @file
- * Default theme implementation for a 'radios' #type form element.
- *
- * Available variables
- * - attributes: A list of HTML attributes for the wrapper element.
- * - children: The rendered radios.
- *
- * @see template_preprocess_radios()
- *
- * @ingroup themeable
- */
-#}
-<div{{ attributes }}>{{ children }}</div>