'Retrieve warmer
:param doc_types: list of document types
:param warmer: anything with ``serialize`` method or a dictionary
:param name: warmer name. If not provided, all warmers for given indices will be deleted
:param querystring_args: additional arguments passed as GET params to ES'

def delete_warmer(self, doc_types=None, indices=None, name=None, querystring_args=None):

    name = (name or '')
    if (not querystring_args):
        querystring_args = {}
    doc_types_str = ''
    if doc_types:
        doc_types_str = ('/' + ','.join(doc_types))
    path = '/{0}{1}/_warmer/{2}'.format(','.join(indices), doc_types_str, name)
    return self._send_request(method='DELETE', path=path, params=querystring_args)
