'Unregisters DISCO handler that is resonsible for this
node/jid combination. When handler is unregistered the branch
is handled in the same way that it\'s parent branch from this moment.'

def delDiscoHandler(self, node='', jid=''):

    (node, key) = self._traversePath(node, jid)
    if node:
        handler = node[key]
        del node[dict][node[str]]
        return handler
