diff --git a/report_xlsx_helper_demo/report/partner_export_xlsx.py b/report_xlsx_helper_demo/report/partner_export_xlsx.py
index 3ea0c813..c9cd55ab 100644
--- a/report_xlsx_helper_demo/report/partner_export_xlsx.py
+++ b/report_xlsx_helper_demo/report/partner_export_xlsx.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright 2009-2018 Noviat.
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).