diff --git a/core/lib/Drupal/Core/Config/Schema/ArrayElement.php b/core/lib/Drupal/Core/Config/Schema/ArrayElement.php
index 9443476..847135e 100644
--- a/core/lib/Drupal/Core/Config/Schema/ArrayElement.php
+++ b/core/lib/Drupal/Core/Config/Schema/ArrayElement.php
@@ -10,7 +10,6 @@
 use Drupal\Component\Utility\String;
 use Drupal\Core\Config\TypedConfigManagerInterface;
 use Drupal\Core\TypedData\TypedData;
-use Drupal\Core\TypedData\TypedDataInterface;
 
 /**
  * Defines a generic configuration element that contains multiple properties.
@@ -103,10 +102,6 @@ public function get($name) {
    * {@inheritdoc}
    */
   public function set($key, $value) {
-    // Support setting values via typed data objects.
-    if ($value instanceof TypedDataInterface) {
-      $value = $value->getValue();
-    }
     $this->value[$key] = $value;
     // Parsed elements must be rebuilt with new values
     unset($this->elements);