Remove obsolete method.

Author: drupol

src/Storage/NodeStorage.php

@@ -39,14 +39,6 @@ public function getParent(): ?NodeInterface
         return $this->get('parent');
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function setChildren(\Traversable $children): StorageInterface
-    {
-        return $this->set('children', $children);
-    }
-
     /**
      * {@inheritdoc}
      */

src/Storage/NodeStorageInterface.php

@@ -22,13 +22,6 @@ public function getChildren();
      */
     public function getParent(): ?NodeInterface;
 
-    /**
-     * @param \Traversable $children
-     *
-     * @return StorageInterface
-     */
-    public function setChildren(\Traversable $children): StorageInterface;
-
     /**
      * @param null|NodeInterface $parent
      *