remove unused imports, variables and commented code

from tests

cookbook/tests/api/test_api_userspace.py

@@ -2,12 +2,9 @@ import json
 
 import pytest
 from django.contrib import auth
-from django.db.models import OuterRef, Subquery
 from django.urls import reverse
 from django_scopes import scopes_disabled
 
-from cookbook.models import Ingredient, Step
-
 LIST_URL = 'api:userspace-list'
 DETAIL_URL = 'api:userspace-detail'