'Removes a server from the private network
:param network_id: Private Network ID
:rtype: ``str``
:param server_id: Id of the server
:rtype: ``str``
:return: Instance of the private network
:rtype: ``dict``'

def ex_remove_server_from_private_network(self, network_id, server_id):

    response = self.connection.request(action=('/private_networks/%s/servers/%s' % (network_id, server_id)), method='POST')
    return response.object
