Deletes the network for the specified VNI.

        Usage:

            ======= =====================
            Method  URI
            ======= =====================
            DELETE  /vtep/networks/{vni}
            ======= =====================

        Request parameters:

            ================ ========================================
            Attribute        Description
            ================ ========================================
            vni              Virtual Network Identifier. (e.g. 10)
            ================ ========================================

        Example::

            $ curl -X DELETE http://localhost:8080/vtep/networks/10 |
             python -m json.tool

        ::

            {
                "10": {
                    "EvpnNetwork": {
                        "ethernet_tag_id": 10,
                        "clients": [
                            {
                                "EvpnClient": {
                                    "ip": "10.0.0.11",
                                    "mac": "e2:b1:0c:ba:42:ed",
                                    "port": 1
                                }
                            }
                        ],
                        "route_dist": "65000:100",
                        "vni": 10
                    }
                }
            }

def del_network(self, **kwargs):
        """
        Deletes the network for the specified VNI.

        Usage:

            ======= =====================
            Method  URI
            ======= =====================
            DELETE  /vtep/networks/{vni}
            ======= =====================

        Request parameters:

            ================ ========================================
            Attribute        Description
            ================ ========================================
            vni              Virtual Network Identifier. (e.g. 10)
            ================ ========================================

        Example::

            $ curl -X DELETE http://localhost:8080/vtep/networks/10 |
             python -m json.tool

        ::

            {
                "10": {
                    "EvpnNetwork": {
                        "ethernet_tag_id": 10,
                        "clients": [
                            {
                                "EvpnClient": {
                                    "ip": "10.0.0.11",
                                    "mac": "e2:b1:0c:ba:42:ed",
                                    "port": 1
                                }
                            }
                        ],
                        "route_dist": "65000:100",
                        "vni": 10
                    }
                }
            }
        """
        try:
            body = self.vtep_app.del_network(**kwargs)
        except (BGPSpeakerNotFound, DatapathNotFound, VniNotFound) as e:
            return e.to_response(status=404)

        return Response(content_type='application/json',
                        body=json.dumps(body))