ERP5Workflow: remove unused actbox_xxx on interactions

product/ERP5Workflow/Document/Interaction.py

@@ -67,12 +67,6 @@ class Interaction(IdAsReferenceMixin('interaction_', "prefix"), XMLObject):
   guard = None
   default_reference = ''
 
-  # these attributes are definded in old interaction but no evidence that
-  # they are in use
-  actbox_name = ''
-  actbox_url = ''
-  actbox_category = 'workflow'
-
   # Declarative security
   security = ClassSecurityInfo()
   security.declareObjectProtected(Permissions.AccessContentsInformation)