code: def delete_track(self, href=None):
          
  
          # Argument error checking.
          assert href is not None
  
          raw_result = self.delete(href)
  
          if raw_result.status != 204:
              raise APIException(raw_result.status, raw_result.json)
docs: Delete a track.
  
          'href' the relative index of the track. May not be none.
  
          Returns nothing.
  
          If the response status is not 204, throws and APIException.