chore: remove all six compat code
diff --git a/erpnext/accounts/party.py b/erpnext/accounts/party.py
index 26ff2c6..2108bc1 100644
--- a/erpnext/accounts/party.py
+++ b/erpnext/accounts/party.py
@@ -26,7 +26,6 @@
 	getdate,
 	nowdate,
 )
-from six import iteritems
 
 import erpnext
 from erpnext import get_company_currency
@@ -508,7 +507,7 @@
 
 	timeline_items = dict(data)
 
-	for date, count in iteritems(timeline_items):
+	for date, count in timeline_items.items():
 		timestamp = get_timestamp(date)
 		out.update({ timestamp: count })