diff --git a/core/lib/Drupal/Core/TypedData/Plugin/DataType/Map.php b/core/lib/Drupal/Core/TypedData/Plugin/DataType/Map.php
index 7694db5..a06b9e3 100644
--- a/core/lib/Drupal/Core/TypedData/Plugin/DataType/Map.php
+++ b/core/lib/Drupal/Core/TypedData/Plugin/DataType/Map.php
@@ -18,7 +18,8 @@
  * complex data type.
  *
  * By default there is no metadata for contained properties. Extending classes
- * may want to override Map::getPropertyDefinitions() to define it.
+ * may want to override MapDataDefinition::getPropertyDefinitions() to define
+ * it.
  *
  * @ingroup typed_data
  *
@@ -52,17 +53,6 @@ class Map extends TypedData implements \IteratorAggregate, ComplexDataInterface
   protected $properties = array();
 
   /**
-   * Gets an array of property definitions of contained properties.
-   *
-   * @return \Drupal\Core\TypedData\DataDefinitionInterface[]
-   *   An array of property definitions of contained properties, keyed by
-   *   property name.
-   */
-  protected function getPropertyDefinitions() {
-    return $this->definition->getPropertyDefinitions();
-  }
-
-  /**
    * {@inheritdoc}
    */
   public function getValue() {