code: def remove_tag(self, task, params={}, **options): 
          
          path = "/tasks/%s/removeTag" % (task)
          return self.client.post(path, params, **options)
docs: Removes a tag from the task. Returns an empty data block.
  
          Parameters
          ----------
          task : {Id} The task to remove a tag from.
          [data] : {Object} Data for the request
            - tag : {Id} The tag to remove from the task.