no need to mix

entities.py

-"""entity classes for optional person entities
+"""entity class person entities
 
 :organization: Logilab
-:copyright: 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+:copyright: 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 :contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
 """
 __docformat__ = "restructuredtext en"
 
-from cubicweb.mixins import EmailableMixIn
 from cubicweb.entities import AnyEntity, fetch_config
 
-
-class Person(EmailableMixIn, AnyEntity):
+class Person(AnyEntity):
     """customized class for Person entities"""
     __regid__ = 'Person'
     fetch_attrs, fetch_order = fetch_config(['surname', 'firstname'])