core/lib/Drupal/Core/Installer/InstallerServiceProvider.php       | 7 -------
 core/lib/Drupal/Core/Installer/NormalInstallerServiceProvider.php | 2 +-
 2 files changed, 1 insertion(+), 8 deletions(-)

diff --git a/core/lib/Drupal/Core/Installer/InstallerServiceProvider.php b/core/lib/Drupal/Core/Installer/InstallerServiceProvider.php
index cf4e604822..cea42f49b2 100644
--- a/core/lib/Drupal/Core/Installer/InstallerServiceProvider.php
+++ b/core/lib/Drupal/Core/Installer/InstallerServiceProvider.php
@@ -26,10 +26,6 @@ public function register(ContainerBuilder $container) {
     $container->register('config.storage', 'Drupal\Core\Config\InstallStorage');
 
     // Replace services with in-memory implementations.
-    $definition = $container->getDefinition('cache_factory');
-    $definition->setClass('Drupal\Core\Cache\MemoryBackendFactory');
-    $definition->setArguments([]);
-    $definition->setMethodCalls([]);
     $container
       ->register('keyvalue', 'Drupal\Core\KeyValueStore\KeyValueMemoryFactory');
     $container
@@ -52,9 +48,6 @@ public function register(ContainerBuilder $container) {
       // we don't need to ship with a custom proxy class.
       ->setLazy(FALSE);
 
-    // Use a performance optimised module extension list.
-    $container->getDefinition('extension.list.module')->setClass('Drupal\Core\Installer\InstallerModuleExtensionList');
-
     parent::register($container);
   }
 
diff --git a/core/lib/Drupal/Core/Installer/NormalInstallerServiceProvider.php b/core/lib/Drupal/Core/Installer/NormalInstallerServiceProvider.php
index f9d1bd2b74..9127260b37 100644
--- a/core/lib/Drupal/Core/Installer/NormalInstallerServiceProvider.php
+++ b/core/lib/Drupal/Core/Installer/NormalInstallerServiceProvider.php
@@ -45,7 +45,7 @@ public function register(ContainerBuilder $container) {
     $container->getDefinition('cache_tags.invalidator.checksum')
       ->clearTag('cache_tags_invalidator');
 
-    // Use performance optimised extension lists.
+    // Use performance-optimized extension lists.
     $container->getDefinition('extension.list.module')->setClass(InstallerModuleExtensionList::class);
     $container->getDefinition('extension.list.theme')->setClass(InstallerThemeExtensionList::class);
     $container->getDefinition('extension.list.theme_engine')->setClass(InstallerThemeEngineExtensionList::class);