diff --git a/core/modules/block/block.admin.inc b/core/modules/block/block.admin.inc
index 15cf9dc..e6da2f6 100644
--- a/core/modules/block/block.admin.inc
+++ b/core/modules/block/block.admin.inc
@@ -94,9 +94,6 @@ function block_admin_edit(Block $entity) {
  *   - form: A render element representing the form.
  */
 function template_preprocess_block_admin_display_form(&$variables) {
-  // @todo Remove/refactor pending http://drupal.org/node/1920886.
-  $children = $variables['form'];
-
   $variables['block_regions'] = $variables['form']['block_regions']['#value'];
   if (isset($variables['block_regions'][BLOCK_REGION_NONE])) {
     $variables['block_regions'][BLOCK_REGION_NONE] = t('Disabled');