code: def remove_route(self, uri, clean_cache=True, host=None):
          
          self.router.remove(uri, clean_cache, host)
docs: This method provides the app user a mechanism by which an already
          existing route can be removed from the :class:`Sanic` object
  
          :param uri: URL Path to be removed from the app
          :param clean_cache: Instruct sanic if it needs to clean up the LRU
              route cache
          :param host: IP address or FQDN specific to the host
          :return: None