'Removes a shared IP address from the specified server.
:param       node_id: ID of the node which should be used
:type        node_id: ``str``
:param       ip: ip which should be used
:type        ip: ``str``
:rtype: ``bool``'

def ex_unshare_ip(self, node_id, ip):

    if isinstance(node_id, Node):
        node_id = node_id.id
    uri = ('/servers/%s/ips/public/%s' % (node_id, ip))
    resp = self.connection.request(uri, method='DELETE')
    return (resp.status == httplib.ACCEPTED)
