--- a/entity.py	Thu Apr 25 17:30:09 2013 +0200
+++ b/entity.py	Thu Apr 25 14:10:55 2013 +0200
@@ -26,7 +26,7 @@
 from logilab.common.decorators import cached
 from logilab.common.deprecation import deprecated
 from logilab.common.registry import yes
-from logilab.mtconverter import TransformData, TransformError, xml_escape
+from logilab.mtconverter import TransformData, xml_escape
 
 from rql.utils import rqlvar_maker
 from rql.stmts import Select