diff --git a/core/modules/block/block.admin.inc b/core/modules/block/block.admin.inc
deleted file mode 100644
index 86c59a8..0000000
--- a/core/modules/block/block.admin.inc
+++ /dev/null
@@ -1,27 +0,0 @@
-<?php
-
-/**
- * @file
- * Admin page callbacks for the block module.
- */
-
-use Drupal\block\Entity\Block;
-use Drupal\Core\Template\Attribute;
-
-/**
- * Page callback: Attaches CSS for the block region demo.
- *
- * @see block_menu()
- *
- * @deprecated Use \Drupal\block\Controller\BlockController::demo()
- */
-function block_admin_demo($theme = NULL) {
-  return array(
-    '#attached' => array(
-      'library' => array(
-        array('block', 'drupal.block.admin'),
-      ),
-    ),
-  );
-}
-