diff -r 6b3523f81f42 -r 26744ad37953 cubicweb/wsgi/handler.py
--- a/cubicweb/wsgi/handler.py	Fri Apr 05 17:21:14 2019 +0200
+++ b/cubicweb/wsgi/handler.py	Fri Apr 05 17:58:19 2019 +0200
@@ -21,8 +21,6 @@
 
 from itertools import chain, repeat
 
-from six.moves import zip
-
 from cubicweb import AuthenticationError
 from cubicweb.web import DirectResponse
 from cubicweb.web.application import CubicWebPublisher