diff --git a/core/lib/Drupal/Core/Property/PropertyContainerInterface.php b/core/lib/Drupal/Core/Property/PropertyContainerInterface.php
index 6baaa96..ed55671 100644
--- a/core/lib/Drupal/Core/Property/PropertyContainerInterface.php
+++ b/core/lib/Drupal/Core/Property/PropertyContainerInterface.php
@@ -15,26 +15,10 @@ use IteratorAggregate;
  */
 interface PropertyContainerInterface extends IteratorAggregate  {
 
-  // Check item access.
-  public function access($account);
-
-  // Validate the item value.
-  public function validate();
-
   public function getProperties();
 
   public function getPropertyDefinitions();
 
-  public function get($name);
-
-  /**
-   * Gets the raw value, i.e. the id of the entity in case of entity references,
-   * or the plain data of fields.
-   */
-  public function getRawValue($property_name);
-
-  public function set($name, $value);
-
   public function __get($name);
 
   public function __set($name, $value);
diff --git a/core/modules/entity/lib/Drupal/entity/EntityPropertyInterface.php b/core/modules/entity/lib/Drupal/entity/EntityPropertyInterface.php
index e1bba54..6b8c33d 100644
--- a/core/modules/entity/lib/Drupal/entity/EntityPropertyInterface.php
+++ b/core/modules/entity/lib/Drupal/entity/EntityPropertyInterface.php
@@ -20,8 +20,4 @@ use Drupal\Core\Property\PropertyContainerInterface;
  */
 interface EntityPropertyInterface extends PropertyListInterface, PropertyContainerInterface {
 
-  /**
-   * @return EntityPropertyItemInterface
-   */
-  public function offsetGet($offset);
-}
\ No newline at end of file
+}