__dav_collection__ flag moved to generic class

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@12367 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/File.py

@@ -76,7 +76,6 @@ class File(Document, CMFFile, ConversionCacheMixin):
   add_permission = Permissions.AddPortalContent
   isPortalContent = 1
   isRADContent = 1
-  __dav_collection__=0
 
   # Declarative security
   security = ClassSecurityInfo()