curl --request DELETE \
  --url https://{tenant}.chronosphere.io/api/v1/data/panel_annotations/{id} \
  --header 'API-Token: <api-key>'

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://{tenant}.chronosphere.io/api/v1/data/panel_annotations/{id}"

	req, _ := http.NewRequest("DELETE", url, nil)

	req.Header.Add("API-Token", "<api-key>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.delete("https://{tenant}.chronosphere.io/api/v1/data/panel_annotations/{id}")
  .header("API-Token", "<api-key>")
  .asString();

const options = {method: 'DELETE', headers: {'API-Token': '<api-key>'}};

fetch('https://{tenant}.chronosphere.io/api/v1/data/panel_annotations/{id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://{tenant}.chronosphere.io/api/v1/data/panel_annotations/{id}"

headers = {"API-Token": "<api-key>"}

response = requests.delete(url, headers=headers)

print(response.text)

{
  "created_by": "<string>",
  "id": "<string>",
  "labels": {},
  "starts_at": "2023-11-07T05:31:56Z",
  "target_reference": "<string>",
  "title": "<string>",
  "type": "DASHBOARD"
}

{
  "code": 123,
  "details": [
    {
      "@type": "<string>"
    }
  ],
  "message": "<string>"
}