chore: remove all six compat code
diff --git a/erpnext/demo/setup/retail.py b/erpnext/demo/setup/retail.py
index 3d2c8b6..0469264 100644
--- a/erpnext/demo/setup/retail.py
+++ b/erpnext/demo/setup/retail.py
@@ -1,8 +1,6 @@
-
 import json
 
 import frappe
-from six import iteritems
 
 from erpnext.demo.domains import data
 
@@ -52,7 +50,7 @@
 	}
 
 	for price_list in ("standard_buying", "standard_selling"):
-		for item, rate in iteritems(locals().get(price_list)):
+		for item, rate in locals().get(price_list).items():
 			frappe.get_doc({
 				"doctype": "Item Price",
 				"price_list": price_list.replace("_", " ").title(),