Issue #3421791: Ensure that Book does not get special core treatment

project_composer.module

@@ -1402,7 +1402,7 @@ function _project_composer_get_removed_components($release_category) {
       'simpletest', 'hal', 'color', 'aggregator', 'tracker', 'quickedit',
       'bartik', 'seven', 'rdf', 'stable', 'classy', 'ckeditor',
       // Removed in Drupal 11, https://www.drupal.org/project/drupal/issues/3265680
-      'statistics', 'tour', 'action', 'forum',
+      'statistics', 'tour', 'action', 'forum', 'book',
     ];
   }
   else {