fix: Failing test, sider and linter

- Remove unused imports
- fix test `test_product_list_attribute_filter_builder`

erpnext/e_commerce/product_data_engine/test_product_data_engine.py

@@ -175,9 +175,7 @@ class TestProductDataEngine(unittest.TestCase):
 
 		filter_engine = ProductFiltersBuilder()
 		attribute_filter = filter_engine.get_attribute_filters()[0]
-		attributes = attribute_filter.item_attribute_values
-
-		attribute_values = [d.attribute_value for d in attributes]
+		attribute_values = attribute_filter.item_attribute_values
 
 		self.assertEqual(attribute_filter.name, "Test Size")
 		self.assertGreater(len(attribute_values), 0)

erpnext/e_commerce/variant_selector/test_variant_selector.py

@@ -1,5 +1,3 @@
-import unittest
-
 import frappe
 
 from erpnext.controllers.item_variant import create_variant

erpnext/stock/doctype/item/item.py

@@ -2,7 +2,6 @@
 # License: GNU General Public License v3. See license.txt
 
 import copy
-import itertools
 import json
 from typing import List
 
@@ -18,11 +17,9 @@ from frappe.utils import (
 	getdate,
 	now_datetime,
 	nowtime,
-	random_string,
 	strip,
 )
 from frappe.utils.html_utils import clean_html
-from frappe.website.utils import clear_cache
 
 import erpnext
 from erpnext.controllers.item_variant import (
@@ -32,10 +29,7 @@ from erpnext.controllers.item_variant import (
 	make_variant_item_code,
 	validate_item_variant_attributes,
 )
-from erpnext.setup.doctype.item_group.item_group import (
-	get_parent_item_groups,
-	invalidate_cache_for,
-)
+from erpnext.setup.doctype.item_group.item_group import invalidate_cache_for
 from erpnext.stock.doctype.item_default.item_default import ItemDefault