code: def delete_query_index(self, design_document_id, index_type, index_name):
          
          if index_type == JSON_INDEX_TYPE:
              index = Index(self, design_document_id, index_name)
          elif index_type == TEXT_INDEX_TYPE:
              index = TextIndex(self, design_document_id, index_name)
          else:
              raise CloudantArgumentError(103, index_type)
          index.delete()
docs: Deletes the query index identified by the design document id,
          index type and index name from the remote database.
  
          :param str design_document_id: The design document id that the index
              exists in.
          :param str index_type: The type of the index to be deleted.  Must
              be either 'text' or 'json'.
          :param str index_name: The index name of the index to be deleted.