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

lms/djangoapps/courseware/context_processor.py

@@ -5,7 +5,7 @@ This is meant to simplify the process of sending user preferences (espec. time_z
 to the templates without having to append every view file.
 
 """
-from __future__ import absolute_import
+
 
 import six