const { SiteClient } = require('datocms-client');
async function run() {
  const client = new SiteClient('YOUR-API-TOKEN');
  
  const webhookId = '312';
  const webhook = await client.webhook.destroy(webhookId);
  
  console.log(webhook);
}
run();

> node example.js
{
  "id": "312",
  "name": "Item type creation/update",
  "enabled": true,
  "url": "https://www.example.com/webhook",
  "customPayload": "{ message: 'Successfully published record!' }",
  "httpBasicUser": "user",
  "httpBasicPassword": "password",
  "headers": {
    "xFoo": "Bar"
  },
  "events": [
    {
      "entityType": "item_type",
      "eventTypes": [
        "update",
        "create"
      ],
      "filter": {
        "entityType": "item_type",
        "entityIds": [
          "42",
          "43"
        ]
      }
    }
  ],
  "payloadApiVersion": "3",
  "nestedItemsInPayload": true
}