code: def remove_attribute_listener(self, attr_name, *args, **kwargs):
          
          attr_name = attr_name.upper()
          return super(Parameters, self).remove_attribute_listener(attr_name, *args, **kwargs)
docs: Remove a paremeter listener that was previously added using :py:func:`add_attribute_listener`.
  
          For example to remove the ``thr_min_callback()`` callback function:
  
          .. code:: python
  
              vehicle.parameters.remove_attribute_listener('thr_min', thr_min_callback)
  
          See :ref:`vehicle_state_observing_parameters` for more information.
  
          :param String attr_name: The parameter name that is to have an observer removed (or '*' to remove an 'all attribute' observer).
          :param args: The callback function to remove.