Remove duplicating security definition.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@37048 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/mixin/cached_convertable.py

@@ -67,10 +67,6 @@ class CachedConvertableMixin:
     Format can be a string or a tuple (e.g. format, resolution).
   """
 
-  # Declarative security
-  security = ClassSecurityInfo()
-
-
   # Declarative security
   security = ClassSecurityInfo()
   security.declareObjectProtected(Permissions.AccessContentsInformation)