diff -r 6b3523f81f42 -r 26744ad37953 cubicweb/web/captcha.py
--- a/cubicweb/web/captcha.py	Fri Apr 05 17:21:14 2019 +0200
+++ b/cubicweb/web/captcha.py	Fri Apr 05 17:58:19 2019 +0200
@@ -24,8 +24,6 @@
 from random import randint, choice
 from io import BytesIO
 
-from six.moves import range
-
 from PIL import Image, ImageFont, ImageDraw, ImageFilter