docs: def remove_asset(self, asset_id, composition_id):
          """Removes an ``Asset`` from a ``Composition``.
  
          arg:    asset_id (osid.id.Id): ``Id`` of the ``Asset``
          arg:    composition_id (osid.id.Id): ``Id`` of the
                  ``Composition``
          raise:  NotFound - ``asset_id``  ``not found in composition_id``
          raise:  NullArgument - ``asset_id`` or ``composition_id`` is
                  ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization fauilure
          *compliance: mandatory -- This method must be implemented.*
  
          """
          self._provider_session.remove_asset(self, asset_id, composition_id)