https://github.com/frictionlessdata/tableschema-bigquery-py#storage

def delete(self, bucket=None, ignore=False):
        """https://github.com/frictionlessdata/tableschema-bigquery-py#storage
        """

        # Make lists
        buckets = bucket
        if isinstance(bucket, six.string_types):
            buckets = [bucket]
        elif bucket is None:
            buckets = reversed(self.buckets)

        # Iterater over buckets
        for bucket in buckets:

            # Non-existent bucket
            if bucket not in self.buckets:
                if not ignore:
                    message = 'Bucket "%s" doesn\'t exist.' % bucket
                    raise tableschema.exceptions.StorageError(message)
                return

            # Remove from descriptors
            if bucket in self.__descriptors:
                del self.__descriptors[bucket]

            # Make delete request
            table_name = self.__mapper.convert_bucket(bucket)
            self.__service.tables().delete(
                projectId=self.__project,
                datasetId=self.__dataset,
                tableId=table_name).execute()

        # Remove tables cache
        self.__buckets = None