'Remove a NameID to userID mapping
:param name_id: NameID instance'

def remove_remote(self, name_id):

    _cn = code(name_id)
    _id = self.db[name_id.text]
    try:
        vals = self.db[_id].split('    ')
        vals.remove(_cn)
        self.db[_id] = '    '.join(vals)
    except KeyError:
        pass
    del self.db[name_id.text]
