curl --request DELETE \
  --url https://apimgmt.cometchat.io/apps/{appId}/extensions/xss-filter/v1/settings \
  --header 'key: <key>' \
  --header 'secret: <secret>'

{
  "data": {
    "statusCode": 200,
    "success": true,
    "responseTime": 3.061743974685669,
    "body": {
      "data": {
        "settings": {
          "dropMessage": false
        }
      }
    }
  }
}