Delete an existing blacklist entry.
        
        Keyword arguments:
        blacklist_entry_id -- The unique identifier of the blacklist entry to delete.

def delete_blacklist_entry(self, blacklist_entry_id):
        """Delete an existing blacklist entry.
        
        Keyword arguments:
        blacklist_entry_id -- The unique identifier of the blacklist entry to delete.
        """
        delete_blacklist_endpoint = Template("${rest_root}/blacklist/${public_key}/${blacklist_entry_id}/delete")
        url = delete_blacklist_endpoint.substitute(rest_root=self._rest_root, public_key=self._public_key, blacklist_entry_id=blacklist_entry_id)
        
        self.__post_request(url, {})