--- a/doc/conf.py	Thu Sep 06 13:44:06 2018 +0200
+++ b/doc/conf.py	Tue Oct 02 16:04:52 2018 +0200
@@ -54,7 +54,6 @@
 extensions = [
   'sphinx.ext.autodoc', 
   'sphinx.ext.viewcode',
-  'logilab.common.sphinx_ext',
   ]
 
 autoclass_content = 'both'