docs: def river_couchdb_delete(self, index_name):
          '''
          https://github.com/elasticsearch/elasticsearch-river-couchdb
  
          Delete's a river for the specified index
          WARNING: It DOES NOT delete the index, only the river, so the only effects of this are that the index will no longer poll CouchDB for updates.
          '''
          request = self.session
          url = 'http://%s:%s/_river/%s' % (self.host, self.port, index_name)
          response = request.delete(url)
          return response