'Delete unused images
Args:
filters (dict): Filters to process on the prune list.
Available filters:
- dangling (bool):  When set to true (or 1), prune only
unused and untagged images.
Returns:
(dict): A dict containing a list of deleted image IDs and
the amount of disk space reclaimed in bytes.
Raises:
:py:class:`docker.errors.APIError`
If the server returns an error.'

@utils.minimum_version('1.25')
def prune_images(self, filters=None):

    url = self._url('/images/prune')
    params = {}
    if (filters is not None):
        params['filters'] = utils.convert_filters(filters)
    return self._result(self._post(url, params=params), True)
