'Deletes an existing ``IndexField`` from the search domain.
:type domain_name: string
:param domain_name: A string that represents the name of a
domain. Domain names must be unique across the domains
owned by an account within an AWS region. Domain names
must start with a letter or number and can contain the
following characters: a-z (lowercase), 0-9, and -
(hyphen). Uppercase letters and underscores are not
allowed.
:type field_name: string
:param field_name: A string that represents the name of
an index field. Field names must begin with a letter and
can contain the following characters: a-z (lowercase),
0-9, and _ (underscore). Uppercase letters and hyphens are
not allowed. The names "body", "docid", and
"text_relevance" are reserved and cannot be specified as
field or rank expression names.
:raises: BaseException, InternalException, ResourceNotFoundException'

def delete_index_field(self, domain_name, field_name):

    doc_path = ('delete_index_field_response', 'delete_index_field_result', 'index_field')
    params = {'DomainName': domain_name, 'IndexFieldName': field_name}
    return self.get_response(doc_path, 'DeleteIndexField', params, verb='POST')
