chore: remove all six compat code
diff --git a/erpnext/regional/india/utils.py b/erpnext/regional/india/utils.py
index e7539f5..9efad6d 100644
--- a/erpnext/regional/india/utils.py
+++ b/erpnext/regional/india/utils.py
@@ -1,4 +1,3 @@
-
 import json
 import re
 
@@ -6,7 +5,6 @@
 from frappe import _
 from frappe.model.utils import get_fetch_values
 from frappe.utils import cint, cstr, date_diff, flt, getdate, nowdate
-from six import string_types
 
 from erpnext.controllers.accounts_controller import get_taxes_and_charges
 from erpnext.controllers.taxes_and_totals import get_itemised_tax, get_itemised_taxable_amount
@@ -193,7 +191,7 @@
 
 @frappe.whitelist()
 def get_regional_address_details(party_details, doctype, company):
-	if isinstance(party_details, string_types):
+	if isinstance(party_details, str):
 		party_details = json.loads(party_details)
 		party_details = frappe._dict(party_details)
 
@@ -790,7 +788,7 @@
 	if country != 'India':
 		return
 
-	if isinstance(account_list, string_types):
+	if isinstance(account_list, str):
 		account_list = json.loads(account_list)
 
 	if not frappe.db.get_single_value('GST Settings', 'round_off_gst_values'):