InteractionWorkflow.py: remove unused function.

product/ERP5Workflow/Document/InteractionWorkflow.py

@@ -180,20 +180,6 @@ class InteractionWorkflow(IdAsReferenceMixin("", "prefix"), Workflow):
     """
     return
 
-  security.declarePrivate('getStateChangeInformation')
-  def getStateChangeInformation(self, document, state, transition=None):
-    """
-    Return an object used for variable tales expression.
-    """
-    if transition is None:
-      transition_url = None
-    else:
-      transition_url = transition.getRelativeUrl()
-    return self.asContext(document=document,
-                          transition=transition,
-                          transition_url=transition_url,
-                          state=state)
-
   security.declarePrivate('getinteraction_workflowVariableMatchDict')
   def getWorklistVariableMatchDict(self, info, check_guard=True):
     return None