Eliminate instances of unused-import Pylint violation

openedx/core/djangoapps/user_api/forms.py

@@ -1,2 +1,3 @@
+# pylint: disable=unused-import, missing-docstring
 # TODO: eventually move this implementation into the user_api
 from student.forms import PasswordResetFormNoActive

openedx/core/djangoapps/user_api/management/tests/test_email_opt_in_list.py

@@ -7,14 +7,11 @@ import csv
 from collections import defaultdict
 from unittest import skipUnless
 
-
 import ddt
 from django.conf import settings
-from django.test.utils import override_settings
 from django.core.management.base import CommandError
 
-
-from xmodule.modulestore.tests.django_utils import ModuleStoreTestCase, mixed_store_config
+from xmodule.modulestore.tests.django_utils import ModuleStoreTestCase
 from xmodule.modulestore.tests.factories import CourseFactory
 from student.tests.factories import UserFactory, CourseEnrollmentFactory
 from student.models import CourseEnrollment

openedx/core/djangoapps/user_api/models.py

@@ -1,7 +1,7 @@
 from django.contrib.auth.models import User
 from django.core.validators import RegexValidator
 from django.db import models
-from django.db.models.signals import pre_delete, post_delete, pre_save, post_save
+from django.db.models.signals import post_delete, pre_save, post_save
 from django.dispatch import receiver
 from model_utils.models import TimeStampedModel
 

openedx/core/djangoapps/user_api/tests/test_models.py

@@ -1,5 +1,6 @@
-import json
-
+"""
+Test UserPreferenceModel and UserPreference events
+"""
 from django.db import IntegrityError
 from django.test import TestCase