'Removes an `IndexField` from the search domain. For more
information, see `Configuring Index Fields`_ in the Amazon
CloudSearch Developer Guide .
:type domain_name: string
:param domain_name: A string that represents the name of a domain.
Domain names are unique across the domains owned by an account
within an AWS region. Domain names start with a letter or number
and can contain the following characters: a-z (lowercase), 0-9, and
- (hyphen).
:type index_field_name: string
:param index_field_name: The name of the index field your want to
remove from the domain\'s indexing options.'

def delete_index_field(self, domain_name, index_field_name):

    params = {'DomainName': domain_name, 'IndexFieldName': index_field_name}
    return self._make_request(action='DeleteIndexField', verb='POST', path='/', params=params)
