Revert "Links to the downloadable_product_samples are direct links"

This reverts commit 5973ab3.

Author: XxXgeoXxX

app/code/Magento/DownloadableGraphQl/Model/Resolver/Product/DownloadableOptions.php

@@ -50,6 +50,8 @@ class DownloadableOptions implements ResolverInterface
     private $linkCollection;
 
     /**
+     * Downloadable file
+     *
      * @var UrlInterface
      */
     private $urlBuilder;