commit 1ec10748d6c42ce54f46ceb5c255cee13c1e1008
Author: Joel Pittet <joel@pittet.ca>
Date:   Thu Jun 13 08:27:03 2013 -0700

    remove preprocess

diff --git a/core/modules/views_ui/templates/views-ui-container.html.twig b/core/modules/views_ui/templates/views-ui-container.html.twig
index 88015b8..2d02467 100644
--- a/core/modules/views_ui/templates/views-ui-container.html.twig
+++ b/core/modules/views_ui/templates/views-ui-container.html.twig
@@ -1,7 +1,7 @@
 {#
 /**
  * @file
- * Default theme implementation for a generic Views UI container/wrapper.
+ * Default theme implementation for a generic views UI container/wrapper.
  *
  * Available variables:
  * - attributes: HTML attributes to apply to the container element.
diff --git a/core/modules/views_ui/views_ui.module b/core/modules/views_ui/views_ui.module
index 56bc343..eea9f76 100644
--- a/core/modules/views_ui/views_ui.module
+++ b/core/modules/views_ui/views_ui.module
@@ -179,7 +179,7 @@ function views_ui_theme() {
     // Generic container wrapper, to use instead of theme_container when an id
     // is not desired.
     'views_ui_container' => array(
-      'render element' => 'element',
+      'variables' => array('children' => NULL),
       'template' => 'views-ui-container',
       'file' => 'views_ui.theme.inc',
     ),
diff --git a/core/modules/views_ui/views_ui.theme.inc b/core/modules/views_ui/views_ui.theme.inc
index ecac355..bbe2274 100644
--- a/core/modules/views_ui/views_ui.theme.inc
+++ b/core/modules/views_ui/views_ui.theme.inc
@@ -8,21 +8,6 @@
 use Drupal\Core\Template\Attribute;
 
 /**
- * Prepares variables for Views UI container templates.
- *
- * Default template: views-ui-container.html.twig.
- *
- * @param array $variables
- *   An associative array containing:
- *   - element: An associative array containing the properties of the element.
- *     Properties used: #attributes, #children.
- */
-function template_preprocess_views_ui_container(&$variables) {
-  $variables['attributes'] = new Attribute($variables['element']['#attributes']);
-  $variables['children'] = $variables['element']['#children'];
-}
-
-/**
  * Prepares variables for Views UI display tab setting templates.
  *
  * Default template: views-ui-display-tab-setting.html.twig.