core/core.services.yml | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/core/core.services.yml b/core/core.services.yml
index 59e8a6f..f18c3f3 100644
--- a/core/core.services.yml
+++ b/core/core.services.yml
@@ -38,10 +38,6 @@ services:
     class: Drupal\Core\Cache\ApcuBackendFactory
   cache.backend.php:
     class: Drupal\Core\Cache\PhpBackendFactory
-  cache.backend.memory:
-    class: Drupal\Core\Cache\MemoryBackendFactory
-  cache.backend.null:
-    class: Drupal\Core\Cache\NullBackendFactory
   cache.bootstrap:
     class: Drupal\Core\Cache\CacheBackendInterface
     tags: