diff --git a/pynxtools/dataconverter/readers/json_map/reader.py b/pynxtools/dataconverter/readers/json_map/reader.py
index 9ca770cb6..65a2eb7c5 100644
--- a/pynxtools/dataconverter/readers/json_map/reader.py
+++ b/pynxtools/dataconverter/readers/json_map/reader.py
@@ -24,7 +24,6 @@
 
 from pynxtools.dataconverter.readers.base.reader import BaseReader
 from pynxtools.dataconverter.template import Template
-# from pynxtools.dataconverter.helpers import ensure_all_required_fields_exist
 from pynxtools.dataconverter import hdfdict