[gen] Removed the obsolete mail notification system.

gen/po.py

@@ -23,9 +23,6 @@ fallbacks = {'en': 'en-us en-ca',
 
 # Default values for i18n labels whose ids are not fixed.
 CONFIG = "Configuration panel for product '%s'"
-EMAIL_SUBJECT = '${siteTitle} - Action \\"${transitionName}\\" has been ' \
-                'performed on element entitled \\"${objectTitle}\\".'
-EMAIL_BODY = 'You can consult this element at ${objectUrl}.'
 CONFIRM = 'Are you sure ?'
 
 # ------------------------------------------------------------------------------