Fix a number of unused-import pylint violations

cms/djangoapps/contentstore/api/views.py

@@ -7,17 +7,14 @@ from path import Path as path
 from six import text_type
 
 from django.conf import settings
-from django.contrib.auth import get_user_model
-from django.views.decorators.csrf import csrf_exempt
 
 from django.core.files import File
-from opaque_keys import InvalidKeyError
 from opaque_keys.edx.keys import CourseKey
 from rest_framework import status
 from rest_framework.exceptions import AuthenticationFailed
 from rest_framework.generics import GenericAPIView
 from rest_framework.response import Response
-from user_tasks.models import UserTaskArtifact, UserTaskStatus
+from user_tasks.models import UserTaskStatus
 
 from student.auth import has_course_author_access
 

cms/djangoapps/contentstore/config/tests/test_models.py

@@ -5,9 +5,7 @@ persistent grading feature.
 import itertools
 
 import ddt
-from django.conf import settings
 from django.test import TestCase
-from mock import patch
 from opaque_keys.edx.locator import CourseLocator
 
 from contentstore.config.models import NewAssetsPageFlag

cms/djangoapps/contentstore/tests/test_contentstore.py

@@ -44,7 +44,7 @@ from xmodule.modulestore import ModuleStoreEnum
 from xmodule.modulestore.django import modulestore
 from xmodule.modulestore.exceptions import ItemNotFoundError
 from xmodule.modulestore.inheritance import own_metadata
-from xmodule.modulestore.tests.factories import CourseFactory, ItemFactory, LibraryFactory, check_mongo_calls
+from xmodule.modulestore.tests.factories import CourseFactory, ItemFactory, check_mongo_calls
 from xmodule.modulestore.xml_exporter import export_course_to_xml
 from xmodule.modulestore.xml_importer import import_course_from_xml, perform_xlint
 from xmodule.seq_module import SequenceDescriptor

cms/djangoapps/contentstore/tests/test_course_listing.py

@@ -32,7 +32,6 @@ from student.roles import (
 )
 from student.tests.factories import UserFactory
 from xmodule.course_module import CourseSummary
-from xmodule.error_module import ErrorDescriptor
 from xmodule.modulestore import ModuleStoreEnum
 from xmodule.modulestore.tests.django_utils import ModuleStoreTestCase
 from xmodule.modulestore.tests.factories import CourseFactory, check_mongo_calls

cms/djangoapps/contentstore/tests/test_signals.py

@@ -5,7 +5,7 @@ from cms.djangoapps.contentstore.signals.handlers import (
     GRADING_POLICY_COUNTDOWN_SECONDS,
     handle_grading_policy_changed
 )
-from student.models import CourseEnrollment, anonymous_id_for_user
+from student.models import CourseEnrollment
 from student.tests.factories import UserFactory
 from xmodule.modulestore.tests.django_utils import ModuleStoreTestCase
 from xmodule.modulestore.tests.factories import CourseFactory

cms/djangoapps/contentstore/views/course.py

@@ -6,7 +6,6 @@ import json
 import logging
 import random
 import string  # pylint: disable=deprecated-module
-import time
 
 import django.utils
 import six

cms/djangoapps/contentstore/views/import_export.py

@@ -27,13 +27,12 @@ from user_tasks.models import UserTaskArtifact, UserTaskStatus
 from wsgiref.util import FileWrapper
 
 from contentstore.storage import course_import_export_storage
-from contentstore.tasks import CourseExportTask, CourseImportTask, create_export_tarball, export_olx, import_olx
+from contentstore.tasks import CourseExportTask, CourseImportTask, export_olx, import_olx
 from contentstore.utils import reverse_course_url, reverse_library_url
 from edxmako.shortcuts import render_to_response
 from student.auth import has_course_author_access
 from util.json_request import JsonResponse
 from util.views import ensure_valid_course_key
-from xmodule.exceptions import SerializationError
 from xmodule.modulestore.django import modulestore
 
 __all__ = [

cms/djangoapps/contentstore/views/item.py

@@ -49,7 +49,7 @@ from edxmako.shortcuts import render_to_string
 from help_tokens.core import HelpUrlExpert
 from models.settings.course_grading import CourseGradingModel
 from openedx.core.djangoapps.schedules.config import COURSE_UPDATE_WAFFLE_FLAG
-from openedx.core.djangoapps.waffle_utils import CourseWaffleFlag, WaffleFlagNamespace, WaffleSwitch
+from openedx.core.djangoapps.waffle_utils import WaffleSwitch
 from openedx.core.lib.gating import api as gating_api
 from openedx.core.lib.xblock_utils import request_token, wrap_xblock
 from static_replace import replace_static_urls

cms/djangoapps/contentstore/views/tests/test_course_index.py

@@ -17,7 +17,7 @@ from search.api import perform_search
 
 from contentstore.courseware_index import CoursewareSearchIndexer, SearchIndexingError
 from contentstore.tests.utils import CourseTestCase
-from contentstore.utils import add_instructor, reverse_course_url, reverse_library_url, reverse_usage_url
+from contentstore.utils import add_instructor, reverse_course_url, reverse_usage_url
 from contentstore.views.course import (
     _deprecated_blocks_info,
     course_outline_initial_state,

cms/djangoapps/contentstore/views/tests/test_videos.py

@@ -24,7 +24,6 @@ from contentstore.utils import reverse_course_url
 from contentstore.views.videos import (
     _get_default_video_image_url,
     validate_video_image,
-    validate_transcript_preferences,
     VIDEO_IMAGE_UPLOAD_ENABLED,
     WAFFLE_SWITCHES,
     TranscriptProvider

cms/djangoapps/models/settings/course_grading.py

@@ -5,7 +5,7 @@ import json
 
 from contentstore.signals.signals import GRADING_POLICY_CHANGED
 from eventtracking import tracker
-from track.event_transaction_utils import create_new_event_transaction_id, set_event_transaction_type
+from track.event_transaction_utils import create_new_event_transaction_id
 from xmodule.modulestore.django import modulestore
 
 GRADING_POLICY_CHANGED_EVENT_TYPE = 'edx.grades.grading_policy_changed'

cms/djangoapps/models/settings/course_metadata.py

@@ -5,8 +5,6 @@ from django.conf import settings
 from django.utils.translation import ugettext as _
 from xblock.fields import Scope
 
-from openedx.core.djangoapps.waffle_utils import WaffleSwitchNamespace
-
 from xblock_django.models import XBlockStudioConfigurationFlag
 from xmodule.modulestore.django import modulestore
 

cms/djangoapps/xblock_config/models.py

@@ -6,7 +6,7 @@ Includes:
 """
 
 from config_models.models import ConfigurationModel
-from django.db.models import BooleanField, TextField
+from django.db.models import TextField
 
 from openedx.core.djangoapps.xmodule_django.models import CourseKeyField
 from request_cache.middleware import request_cached