ERP5Workflow: remove _invokeWithNotification

It should not be useful with the new WorkflowTool.

product/ERP5Workflow/Tool/WorkflowTool.py

@@ -213,9 +213,7 @@ class WorkflowTool(BaseTool, OriginalWorkflowTool):
         raise WorkflowException(_(u'Requested workflow definition not found.'))
       if workflow.getPortalType() == 'Workflow':
         action_id = workflow.getTransitionIdByReference(action_reference)
-    result = self._invokeWithNotification(
-      workflow_list, current_object, action_id, workflow.doActionFor, 
-      (current_object, action_id) + args, kw)
+    result = workflow.doActionFor(current_object, action_id)
     return result
 
   security.declareProtected(Permissions.AccessContentsInformation,