Run 2to3 -f future . -w

This will remove imports from __future__ that are no longer needed.

https://docs.python.org/3.5/library/2to3.html#2to3fixer-future

openedx/features/course_experience/plugins.py

@@ -3,7 +3,7 @@ Platform plugins to support the course experience.
 
 This includes any locally defined CourseTools.
 """
-from __future__ import absolute_import
+
 
 from django.urls import reverse
 from django.utils.translation import ugettext as _