diff --git a/core/modules/book/book.module b/core/modules/book/book.module
index 317a8853d0a8475ed7e77b152375ba2dae4e16c3..29b7460cc8cce025cfadc7b8a4abf07119cd27c4 100644
--- a/core/modules/book/book.module
+++ b/core/modules/book/book.module
@@ -776,23 +776,3 @@ function book_node_type_update(NodeTypeInterface $type) {
     $config->save();
   }
 }
-
-/**
- * Implements hook_library_info().
- */
-function book_library_info() {
-  $libraries['drupal.book'] = array(
-    'title' => 'Book',
-    'version' => \Drupal::VERSION,
-    'js' => array(
-      drupal_get_path('module', 'book') . '/book.js' => array(),
-    ),
-    'dependencies' => array(
-      array('system', 'jquery'),
-      array('system', 'drupal'),
-      array('system', 'drupal.form'),
-    ),
-  );
-
-  return $libraries;
-}