refactor: Remove unused imports & code

payments/payments/doctype/payment_gateway/payment_gateway.py

@@ -2,7 +2,6 @@
 # Copyright (c) 2015, Frappe Technologies Pvt. Ltd. and contributors
 # License: MIT. See LICENSE
 
-import frappe
 from frappe.model.document import Document
 
 

payments/payments/doctype/payment_gateway/test_payment_gateway.py

@@ -3,8 +3,6 @@
 # License: MIT. See LICENSE
 import unittest
 
-import frappe
-
 # test_records = frappe.get_test_records('Payment Gateway')