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

common/lib/xmodule/xmodule/backcompat_module.py

@@ -1,7 +1,7 @@
 """
 These modules exist to translate old format XML into newer, semantic forms
 """
-from __future__ import absolute_import
+
 
 import logging
 import traceback