Avoid using file external and reference to OneDrive files because the…

…y require login

repository/office365/lib.php

@@ -801,7 +801,7 @@ protected function contents_api_response_to_list($response, $path, $clienttype,
      * @return int
      */
     public function supported_returntypes() {
-        return FILE_INTERNAL | FILE_EXTERNAL | FILE_REFERENCE;
+        return FILE_INTERNAL;
     }
 
     /**