diff --git a/core/modules/book/book.admin.inc b/core/modules/book/book.admin.inc
index e2c5141dc0a0..07d4552be9a8 100644
--- a/core/modules/book/book.admin.inc
+++ b/core/modules/book/book.admin.inc
@@ -5,10 +5,6 @@
  * Administration page callbacks for the Book module.
  */
 
-use Drupal\Component\Utility\Crypt;
-use Drupal\Core\Entity\EntityInterface;
-use Drupal\Core\Language\Language;
-
 /**
  * Returns HTML for a book administration form.
  *
diff --git a/core/modules/book/lib/Drupal/book/Access/BookNodeIsRemovableAccessCheck.php b/core/modules/book/lib/Drupal/book/Access/BookNodeIsRemovableAccessCheck.php
index 2ca533070245..6a5385c1dc0c 100644
--- a/core/modules/book/lib/Drupal/book/Access/BookNodeIsRemovableAccessCheck.php
+++ b/core/modules/book/lib/Drupal/book/Access/BookNodeIsRemovableAccessCheck.php
@@ -7,7 +7,6 @@
 
 namespace Drupal\book\Access;
 
-use Drupal\book\BookManager;
 use Drupal\book\BookManagerInterface;
 use Drupal\Core\Routing\Access\AccessInterface;
 use Drupal\Core\Session\AccountInterface;
diff --git a/core/modules/book/lib/Drupal/book/BookExport.php b/core/modules/book/lib/Drupal/book/BookExport.php
index c86e25c949a3..4d220c9779f7 100644
--- a/core/modules/book/lib/Drupal/book/BookExport.php
+++ b/core/modules/book/lib/Drupal/book/BookExport.php
@@ -9,7 +9,6 @@ namespace Drupal\book;
 
 use Drupal\Core\Entity\EntityManagerInterface;
 use Drupal\node\NodeInterface;
-use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
 /**
  * Provides methods for exporting book to different formats.
diff --git a/core/modules/book/lib/Drupal/book/BookManager.php b/core/modules/book/lib/Drupal/book/BookManager.php
index 50a51895680c..3a099c5c8f20 100644
--- a/core/modules/book/lib/Drupal/book/BookManager.php
+++ b/core/modules/book/lib/Drupal/book/BookManager.php
@@ -10,9 +10,7 @@ namespace Drupal\book;
 use Drupal\Component\Utility\Unicode;
 use Drupal\Core\Cache\Cache;
 use Drupal\Core\Database\Connection;
-use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\EntityManagerInterface;
-use Drupal\Core\Language\Language;
 use Drupal\Core\Session\AccountInterface;
 use Drupal\Core\StringTranslation\TranslationInterface;
 use Drupal\Core\Config\ConfigFactoryInterface;
diff --git a/core/modules/book/lib/Drupal/book/Controller/BookController.php b/core/modules/book/lib/Drupal/book/Controller/BookController.php
index 8f66f779bd79..49a49476b535 100644
--- a/core/modules/book/lib/Drupal/book/Controller/BookController.php
+++ b/core/modules/book/lib/Drupal/book/Controller/BookController.php
@@ -7,7 +7,6 @@
 
 namespace Drupal\book\Controller;
 
-use Drupal\book\BookManager;
 use Drupal\book\BookExport;
 use Drupal\book\BookManagerInterface;
 use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
diff --git a/core/modules/book/lib/Drupal/book/Form/BookAdminEditForm.php b/core/modules/book/lib/Drupal/book/Form/BookAdminEditForm.php
index 214823797712..41dfad2bdaea 100644
--- a/core/modules/book/lib/Drupal/book/Form/BookAdminEditForm.php
+++ b/core/modules/book/lib/Drupal/book/Form/BookAdminEditForm.php
@@ -12,7 +12,6 @@ use Drupal\Component\Utility\Crypt;
 use Drupal\Core\Cache\CacheBackendInterface;
 use Drupal\Core\Entity\EntityStorageControllerInterface;
 use Drupal\Core\Form\FormBase;
-use Drupal\menu_link\MenuLinkStorageControllerInterface;
 use Drupal\node\NodeInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
diff --git a/core/modules/book/lib/Drupal/book/Tests/BookTest.php b/core/modules/book/lib/Drupal/book/Tests/BookTest.php
index aa4758a89cf7..36f8e1272952 100644
--- a/core/modules/book/lib/Drupal/book/Tests/BookTest.php
+++ b/core/modules/book/lib/Drupal/book/Tests/BookTest.php
@@ -7,7 +7,6 @@
 
 namespace Drupal\book\Tests;
 
-use Drupal\Core\Language\Language;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\simpletest\WebTestBase;