diff --git a/core/core.services.yml b/core/core.services.yml
index 4144aeb..32d1c40 100644
--- a/core/core.services.yml
+++ b/core/core.services.yml
@@ -761,6 +761,6 @@ services:
     class: Drupal\Core\Asset\AssetDumper
   library.discovery:
     class: Drupal\Core\Asset\LibraryDiscovery
-    arguments: ['@cache.cache', '@module_handler', '@theme_handler']
+    arguments: ['@cache.cache', '@module_handler']
   info_parser:
     class: Drupal\Core\Extension\InfoParser
diff --git a/core/lib/Drupal/Core/Asset/LibraryDiscovery.php b/core/lib/Drupal/Core/Asset/LibraryDiscovery.php
index aa351dd..130876a 100644
--- a/core/lib/Drupal/Core/Asset/LibraryDiscovery.php
+++ b/core/lib/Drupal/Core/Asset/LibraryDiscovery.php
@@ -50,10 +50,8 @@ class LibraryDiscovery implements LibraryDiscoveryInterface {
    *   The cache backend.
    * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
    *   The module handler.
-   * @param \Drupal\Core\Extension\ThemeHandlerInterface $theme_handler
-   *   The theme handler.
    */
-  public function __construct(CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler, ThemeHandlerInterface $theme_handler) {
+  public function __construct(CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler) {
     $this->cache = $cache_backend;
     $this->moduleHandler = $module_handler;
   }