--- a/server/hook.py	Mon Jul 01 16:13:17 2013 +0200
+++ b/server/hook.py	Thu Jan 23 12:32:16 2014 +0100
@@ -1,4 +1,4 @@
-# copyright 2003-2012 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2003-2013 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
 #
 # This file is part of CubicWeb.
@@ -257,8 +257,8 @@
 from logilab.common.decorators import classproperty, cached
 from logilab.common.deprecation import deprecated, class_renamed
 from logilab.common.logging_ext import set_log_methods
-from logilab.common.registry import (Predicate, NotPredicate, OrPredicate,
-                                     objectify_predicate, yes)
+from logilab.common.registry import (NotPredicate, OrPredicate,
+                                     objectify_predicate)
 
 from cubicweb import RegistryNotFound, server
 from cubicweb.cwvreg import CWRegistry, CWRegistryStore