curl --request DELETE \
  --url https://app.launchdarkly.com/api/v2/projects/{projectKey}/views/{viewKey}/link/{resourceType} \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --header 'LD-API-Version: <ld-api-version>' \
  --data '
{
  "filter": "maintainerId:507f1f77bcf86cd799439011,tags:backend+beta",
  "keys": [
    "flag-1",
    "flag-2"
  ],
  "comment": ""
}
'

import requests

url = "https://app.launchdarkly.com/api/v2/projects/{projectKey}/views/{viewKey}/link/{resourceType}"

payload = {
    "filter": "maintainerId:507f1f77bcf86cd799439011,tags:backend+beta",
    "keys": ["flag-1", "flag-2"],
    "comment": ""
}
headers = {
    "LD-API-Version": "<ld-api-version>",
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'DELETE',
  headers: {
    'LD-API-Version': '<ld-api-version>',
    Authorization: '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    filter: 'maintainerId:507f1f77bcf86cd799439011,tags:backend+beta',
    keys: ['flag-1', 'flag-2'],
    comment: ''
  })
};

fetch('https://app.launchdarkly.com/api/v2/projects/{projectKey}/views/{viewKey}/link/{resourceType}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://app.launchdarkly.com/api/v2/projects/{projectKey}/views/{viewKey}/link/{resourceType}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "DELETE",
  CURLOPT_POSTFIELDS => json_encode([
    'filter' => 'maintainerId:507f1f77bcf86cd799439011,tags:backend+beta',
    'keys' => [
        'flag-1',
        'flag-2'
    ],
    'comment' => ''
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "Content-Type: application/json",
    "LD-API-Version: <ld-api-version>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://app.launchdarkly.com/api/v2/projects/{projectKey}/views/{viewKey}/link/{resourceType}"

	payload := strings.NewReader("{\n  \"filter\": \"maintainerId:507f1f77bcf86cd799439011,tags:backend+beta\",\n  \"keys\": [\n    \"flag-1\",\n    \"flag-2\"\n  ],\n  \"comment\": \"\"\n}")

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

	req.Header.Add("LD-API-Version", "<ld-api-version>")
	req.Header.Add("Authorization", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.delete("https://app.launchdarkly.com/api/v2/projects/{projectKey}/views/{viewKey}/link/{resourceType}")
  .header("LD-API-Version", "<ld-api-version>")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"filter\": \"maintainerId:507f1f77bcf86cd799439011,tags:backend+beta\",\n  \"keys\": [\n    \"flag-1\",\n    \"flag-2\"\n  ],\n  \"comment\": \"\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.launchdarkly.com/api/v2/projects/{projectKey}/views/{viewKey}/link/{resourceType}")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Delete.new(url)
request["LD-API-Version"] = '<ld-api-version>'
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"filter\": \"maintainerId:507f1f77bcf86cd799439011,tags:backend+beta\",\n  \"keys\": [\n    \"flag-1\",\n    \"flag-2\"\n  ],\n  \"comment\": \"\"\n}"

response = http.request(request)
puts response.read_body

{
  "failedResources": [
    {
      "environmentId": "environmentId",
      "resourceKey": "resourceKey",
      "errorMessage": "errorMessage",
      "resourceType": "flag"
    },
    {
      "environmentId": "environmentId",
      "resourceKey": "resourceKey",
      "errorMessage": "errorMessage",
      "resourceType": "flag"
    }
  ],
  "successCount": 0,
  "failureCount": 6
}

{
  "code": "code",
  "message": "message"
}

{
  "code": "code",
  "message": "message"
}

{
  "code": "code",
  "message": "message"
}

{
  "code": "code",
  "message": "message"
}