diff --git a/core/modules/content_translation/content_translation.module b/core/modules/content_translation/content_translation.module
index 21b315a..f334336 100644
--- a/core/modules/content_translation/content_translation.module
+++ b/core/modules/content_translation/content_translation.module
@@ -5,13 +5,11 @@
  * Allows entities to be translated into different languages.
  */
 
-use Drupal\content_translation\Plugin\Derivative\ContentTranslationLocalTasks;
 use Drupal\Core\Entity\ContentEntityInterface;
 use Drupal\Core\Entity\EntityFormControllerInterface;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Language\Language;
 use Drupal\Core\Session\AccountInterface;
-use Drupal\Core\TypedData\TranslatableInterface;
 use Drupal\node\NodeInterface;
 
 /**
@@ -198,7 +196,6 @@ function content_translation_menu() {
     // Provide the translation UI only for enabled types.
     if (content_translation_enabled($entity_type)) {
       $path = _content_translation_link_to_router_path($entity_type, $info->getLinkTemplate('canonical'));
-      $entity_position = count(explode('/', $path)) - 1;
       $keys = array_flip(array('load_arguments'));
       $translation = $info->get('translation');
       $menu_info = array_intersect_key($translation['content_translation'], $keys) + array('file' => 'content_translation.pages.inc');
@@ -213,8 +210,6 @@ function content_translation_menu() {
       // Add translation callback.
       // @todo Add the access callback instead of replacing it as soon as the
       // routing system supports multiple callbacks.
-      $language_position = $entity_position + 3;
-      $args = array($entity_position, $language_position, $language_position + 1);
       $items["$path/translations/add/%language/%language"] = array(
         'title' => 'Add',
         'route_name' => "content_translation.translation_add_$entity_type",
@@ -222,7 +217,6 @@ function content_translation_menu() {
       );
 
       // Edit translation callback.
-      $args = array($entity_position, $language_position);
       $items["$path/translations/edit/%language"] = array(
         'title' => 'Edit',
         'route_name' => "content_translation.translation_edit_$entity_type",
diff --git a/core/modules/content_translation/lib/Drupal/content_translation/ContentTranslationController.php b/core/modules/content_translation/lib/Drupal/content_translation/ContentTranslationController.php
index e99c9b0..cd1e497 100644
--- a/core/modules/content_translation/lib/Drupal/content_translation/ContentTranslationController.php
+++ b/core/modules/content_translation/lib/Drupal/content_translation/ContentTranslationController.php
@@ -285,7 +285,6 @@ public function entityFormAlter(array &$form, array &$form_state, EntityInterfac
    * @see \Drupal\content_translation\ContentTranslationController::entityFormAlter()
    */
   public function entityFormSharedElements($element, $form_state, $form) {
-    static $ignored_types;
 
     // @todo Find a more reliable way to determine if a form element concerns a
     //   multilingual value.
@@ -330,7 +329,6 @@ public function entityFormSharedElements($element, $form_state, $form) {
    *   A form element array.
    */
   protected function addTranslatabilityClue(&$element) {
-    static $suffix, $fapi_title_elements;
 
     // Elements which can have a #title attribute according to FAPI Reference.
     if (!isset($suffix)) {
diff --git a/core/modules/content_translation/lib/Drupal/content_translation/FieldTranslationSynchronizer.php b/core/modules/content_translation/lib/Drupal/content_translation/FieldTranslationSynchronizer.php
index 4efde31..3dd27d6 100644
--- a/core/modules/content_translation/lib/Drupal/content_translation/FieldTranslationSynchronizer.php
+++ b/core/modules/content_translation/lib/Drupal/content_translation/FieldTranslationSynchronizer.php
@@ -8,7 +8,6 @@
 namespace Drupal\content_translation;
 
 use Drupal\Core\Entity\ContentEntityInterface;
-use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\EntityManagerInterface;
 
 /**
diff --git a/core/modules/content_translation/lib/Drupal/content_translation/Form/ContentTranslationDeleteForm.php b/core/modules/content_translation/lib/Drupal/content_translation/Form/ContentTranslationDeleteForm.php
index 5d33cdf..33d8d5e 100644
--- a/core/modules/content_translation/lib/Drupal/content_translation/Form/ContentTranslationDeleteForm.php
+++ b/core/modules/content_translation/lib/Drupal/content_translation/Form/ContentTranslationDeleteForm.php
@@ -40,7 +40,6 @@ public function getFormId() {
    */
   public function buildForm(array $form, array &$form_state, $_entity_type = NULL, $language = NULL) {
     $this->entity = $this->getRequest()->attributes->get($_entity_type);
-    $uri = $this->entity->uri('drupal:content-translation-overview');
     $this->language = language_load($language);
     return parent::buildForm($form, $form_state);
   }
diff --git a/core/modules/content_translation/lib/Drupal/content_translation/Plugin/Derivative/ContentTranslationContextualLinks.php b/core/modules/content_translation/lib/Drupal/content_translation/Plugin/Derivative/ContentTranslationContextualLinks.php
index 45575d0..891b70c 100644
--- a/core/modules/content_translation/lib/Drupal/content_translation/Plugin/Derivative/ContentTranslationContextualLinks.php
+++ b/core/modules/content_translation/lib/Drupal/content_translation/Plugin/Derivative/ContentTranslationContextualLinks.php
@@ -9,7 +9,6 @@
 
 use Drupal\Component\Plugin\Derivative\DerivativeBase;
 use Drupal\Core\Plugin\Discovery\ContainerDerivativeInterface;
-use Drupal\Core\Routing\RouteProviderInterface;
 use Drupal\content_translation\ContentTranslationManagerInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
diff --git a/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationSyncImageTest.php b/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationSyncImageTest.php
index baf99d8..78a3efc 100644
--- a/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationSyncImageTest.php
+++ b/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationSyncImageTest.php
@@ -8,7 +8,6 @@
 namespace Drupal\content_translation\Tests;
 
 use Drupal\Core\Entity\EntityInterface;
-use Drupal\Core\Language\Language;
 
 /**
  * Tests the Content Translation image field synchronization capability.
diff --git a/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationSyncUnitTest.php b/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationSyncUnitTest.php
index a1e0805..509287e 100644
--- a/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationSyncUnitTest.php
+++ b/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationSyncUnitTest.php
@@ -7,7 +7,6 @@
 
 namespace Drupal\content_translation\Tests;
 
-use Drupal\Core\Language\Language;
 use Drupal\simpletest\DrupalUnitTestBase;
 use Drupal\content_translation\FieldTranslationSynchronizer;
 
diff --git a/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationUITest.php b/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationUITest.php
index 8a1b198..5c918ea 100644
--- a/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationUITest.php
+++ b/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationUITest.php
@@ -8,7 +8,6 @@
 namespace Drupal\content_translation\Tests;
 
 use Drupal\Core\Entity\EntityInterface;
-use Drupal\Core\Entity\ContentEntityBase;
 use Drupal\Core\Language\Language;
 
 /**
diff --git a/core/modules/content_translation/lib/Drupal/content_translation/Tests/Views/TranslationLinkTest.php b/core/modules/content_translation/lib/Drupal/content_translation/Tests/Views/TranslationLinkTest.php
index fe45379..e5f131b 100644
--- a/core/modules/content_translation/lib/Drupal/content_translation/Tests/Views/TranslationLinkTest.php
+++ b/core/modules/content_translation/lib/Drupal/content_translation/Tests/Views/TranslationLinkTest.php
@@ -7,7 +7,6 @@
 
 namespace Drupal\content_translation\Tests\Views;
 
-use Drupal\views\Tests\ViewTestBase;
 use Drupal\content_translation\Tests\ContentTranslationTestBase;
 use Drupal\views\Tests\ViewTestData;