diff --git a/common/djangoapps/student/helpers.py b/common/djangoapps/student/helpers.py
index 1339dd71277e..fa476c3e2613 100644
--- a/common/djangoapps/student/helpers.py
+++ b/common/djangoapps/student/helpers.py
@@ -66,7 +66,6 @@
 from submissions.models import StudentItem, Submission
 from submissions import api as submissions_api
 from xmodule.modulestore.django import modulestore
-from lms.djangoapps.grades.models import PersistentSubsectionGrade
 from openedx.core.djangoapps.enrollments.data import get_course_enrollments
 
 # Enumeration of per-course verification statuses