InteractionWorkflow.py: _updateWorkflowHistory do nothing because interaction...

InteractionWorkflow.py: _updateWorkflowHistory do nothing because interaction workflow is stateless.

product/ERP5Workflow/Document/InteractionWorkflow.py

@@ -176,21 +176,9 @@ class InteractionWorkflow(IdAsReferenceMixin("", "prefix"), Workflow):
   security.declarePrivate('_updateWorkflowHistory')
   def _updateWorkflowHistory(self, document, status_dict):
     """
-    Change the state of the object.
+    Stateless.
     """
-    # Create history attributes if needed
-    if getattr(aq_base(document), 'workflow_history', None) is None:
-      document.workflow_history = PersistentMapping()
-      # XXX this _p_changed is apparently not necessary
-      document._p_changed = 1
-
-    # Add an entry for the workflow in the history
-    workflow_key = self._generateHistoryKey()
-    if not document.workflow_history.has_key(workflow_key):
-      document.workflow_history[workflow_key] = ()
-
-    # Update history
-    document.workflow_history[workflow_key] += (status_dict,)
+    return
 
   security.declarePrivate('getStateChangeInformation')
   def getStateChangeInformation(self, document, state, transition=None):