Update comments and remove some unnecessary code

lms/djangoapps/open_ended_grading/tests.py

 """
-This file demonstrates writing tests using the unittest module. These will pass
-when you run "manage.py test".
+Tests for open ended grading interfaces
 
-Replace this with more appropriate tests for your application.
+django-admin.py test --settings=lms.envs.test --pythonpath=. lms/djangoapps/open_ended_grading
 """
 
 from django.test import TestCase

lms/djangoapps/open_ended_grading/views.py

 # Grading Views
 
-from collections import defaultdict
-import csv
 import logging
-import os
 import urllib
 
 from django.conf import settings
-from django.contrib.auth.models import User, Group
-from django.http import HttpResponse
-from django_future.csrf import ensure_csrf_cookie
 from django.views.decorators.cache import cache_control
 from mitxmako.shortcuts import render_to_response
 from django.core.urlresolvers import reverse
 
-from courseware import grades
-from courseware.access import has_access, get_access_group_name
-from courseware.courses import get_course_with_access 
-from django_comment_client.models import Role, FORUM_ROLE_ADMINISTRATOR, FORUM_ROLE_MODERATOR, FORUM_ROLE_COMMUNITY_TA
-from django_comment_client.utils import has_forum_access
-from psychometrics import psychoanalyze
-from student.models import CourseEnrollment
 from student.models import unique_id_for_user
-from xmodule.course_module import CourseDescriptor
-from xmodule.modulestore import Location
-from xmodule.modulestore.django import modulestore
-from xmodule.modulestore.exceptions import InvalidLocationError, ItemNotFoundError, NoPathToItem
-from xmodule.modulestore.search import path_to_location
+from courseware.courses import get_course_with_access 
 
 from peer_grading_service import PeerGradingService
 from peer_grading_service import MockPeerGradingService
 from grading_service import GradingServiceError
 import json
-import track.views
-
 from .staff_grading import StaffGrading
 
 
@@ -52,14 +33,11 @@ def staff_grading(request, course_id):
     """
     course = get_course_with_access(request.user, course_id, 'staff')
 
-    grading = StaffGrading(course)
-
     ajax_url = reverse('staff_grading', kwargs={'course_id': course_id})
     if not ajax_url.endswith('/'):
         ajax_url += '/'
         
     return render_to_response('instructor/staff_grading.html', {
-        'view_html': '',
         'course': course,
         'course_id': course_id,
         'ajax_url': ajax_url,
@@ -99,7 +77,6 @@ def peer_grading(request, course_id):
         ajax_url += '/'
 
     return render_to_response('peer_grading/peer_grading.html', { 
-        'view_html': '',
         'course': course,
         'course_id': course_id,
         'ajax_url': ajax_url,