pylint cleanup.

common/djangoapps/student/tests/test_email.py

@@ -15,7 +15,6 @@ from django.conf import settings
 from edxmako.shortcuts import render_to_string
 from edxmako.tests import mako_middleware_process_request
 from util.request import safe_get_host
-from textwrap import dedent
 
 
 class TestException(Exception):

common/djangoapps/student/tests/test_enrollment.py

@@ -1,8 +1,6 @@
 """
 Tests for student enrollment.
 """
-from datetime import datetime, timedelta
-import pytz
 import ddt
 import unittest
 

common/djangoapps/student/tests/test_recent_enrollments.py

@@ -4,7 +4,6 @@ Tests for the recently enrolled messaging within the Dashboard.
 import datetime
 from django.conf import settings
 from django.core.urlresolvers import reverse
-from django.test import Client
 from opaque_keys.edx import locator
 from pytz import UTC
 import unittest

common/djangoapps/terrain/stubs/tests/test_xqueue_stub.py

@@ -6,8 +6,6 @@ import mock
 import unittest
 import json
 import requests
-import time
-import copy
 from ..xqueue import StubXQueueService, StubXQueueHandler
 
 

common/djangoapps/track/tests/test_middleware.py

@@ -1,5 +1,3 @@
-import re
-
 from mock import patch
 from mock import sentinel