diff --git a/mod/pubsubhubbub.php b/mod/pubsubhubbub.php
deleted file mode 100644
index 5dda9ee0a..000000000
--- a/mod/pubsubhubbub.php
+++ /dev/null
@@ -1,147 +0,0 @@
-<?php
-/**
- * @copyright Copyright (C) 2010-2022, the Friendica project
- *
- * @license GNU AGPL version 3 or any later version
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-
-use Friendica\App;
-use Friendica\Core\Logger;
-use Friendica\Core\System;
-use Friendica\Database\DBA;
-use Friendica\DI;
-use Friendica\Model\PushSubscriber;
-use Friendica\Util\Strings;
-
-function pubsubhubbub_init(App $a) {
-	// PuSH subscription must be considered "public" so just block it
-	// if public access isn't enabled.
-	if (DI::config()->get('system', 'block_public')) {
-		throw new \Friendica\Network\HTTPException\ForbiddenException();
-	}
-
-	// Subscription request from subscriber
-	// https://pubsubhubbub.googlecode.com/git/pubsubhubbub-core-0.4.html#anchor4
-	// Example from GNU Social:
-	// [hub_mode] => subscribe
-	// [hub_callback] => http://status.local/main/push/callback/1
-	// [hub_verify] => sync
-	// [hub_verify_token] => af11...
-	// [hub_secret] => af11...
-	// [hub_topic] => http://friendica.local/dfrn_poll/sazius
-
-	if (DI::args()->getMethod() === App\Router::POST) {
-		$hub_mode         = $_POST['hub_mode']         ?? '';
-		$hub_callback     = $_POST['hub_callback']     ?? '';
-		$hub_verify_token = $_POST['hub_verify_token'] ?? '';
-		$hub_secret       = $_POST['hub_secret']       ?? '';
-		$hub_topic        = $_POST['hub_topic']        ?? '';
-
-		// check for valid hub_mode
-		if ($hub_mode === 'subscribe') {
-			$subscribe = 1;
-		} elseif ($hub_mode === 'unsubscribe') {
-			$subscribe = 0;
-		} else {
-			Logger::notice("Invalid hub_mode=$hub_mode, ignoring.");
-			throw new \Friendica\Network\HTTPException\NotFoundException();
-		}
-
-		Logger::info("$hub_mode request from " . $_SERVER['REMOTE_ADDR']);
-
-		if (DI::args()->getArgc() > 1) {
-			// Normally the url should now contain the nick name as last part of the url
-			$nick = DI::args()->getArgv()[1];
-		} else {
-			// Get the nick name from the topic as a fallback
-			$nick = $hub_topic;
-		}
-		// Extract nick name and strip any .atom extension
-		$nick = basename($nick, '.atom');
-
-		if (!$nick) {
-			Logger::notice('Bad hub_topic=$hub_topic, ignoring.');
-			throw new \Friendica\Network\HTTPException\NotFoundException();
-		}
-
-		// fetch user from database given the nickname
-		$condition = ['nickname' => $nick, 'account_expired' => false, 'account_removed' => false];
-		$owner = DBA::selectFirst('user', ['uid', 'nickname'], $condition);
-		if (!DBA::isResult($owner)) {
-			Logger::notice('Local account not found: ' . $nick . ' - topic: ' . $hub_topic . ' - callback: ' . $hub_callback);
-			throw new \Friendica\Network\HTTPException\NotFoundException();
-		}
-
-		// get corresponding row from contact table
-		$condition = ['uid' => $owner['uid'], 'blocked' => false,
-			'pending' => false, 'self' => true];
-		$contact = DBA::selectFirst('contact', ['poll'], $condition);
-		if (!DBA::isResult($contact)) {
-			Logger::notice('Self contact for user ' . $owner['uid'] . ' not found.');
-			throw new \Friendica\Network\HTTPException\NotFoundException();
-		}
-
-		// sanity check that topic URLs are the same
-		$hub_topic2 = str_replace('/feed/', '/dfrn_poll/', $hub_topic);
-		$self = DI::baseUrl() . '/api/statuses/user_timeline/' . $owner['nickname'] . '.atom';
-
-		if (!Strings::compareLink($hub_topic, $contact['poll']) && !Strings::compareLink($hub_topic2, $contact['poll']) && !Strings::compareLink($hub_topic, $self)) {
-			Logger::notice('Hub topic ' . $hub_topic . ' != ' . $contact['poll']);
-			throw new \Friendica\Network\HTTPException\NotFoundException();
-		}
-
-		// do subscriber verification according to the PuSH protocol
-		$hub_challenge = Strings::getRandomHex(40);
-
-		$params = http_build_query([
-			'hub.mode' => $subscribe == 1 ? 'subscribe' : 'unsubscribe',
-			'hub.topic' => $hub_topic,
-			'hub.challenge' => $hub_challenge,
-			'hub.verify_token' => $hub_verify_token,
-
-			// lease time is hard coded to one week (in seconds)
-			// we don't actually enforce the lease time because GNU
-			// Social/StatusNet doesn't honour it (yet)
-			'hub.lease_seconds' => 604800,
-		]);
-
-		$hub_callback = rtrim($hub_callback, ' ?&#');
-		$separator = parse_url($hub_callback, PHP_URL_QUERY) === null ? '?' : '&';
-
-		$fetchResult = DI::httpClient()->fetchFull($hub_callback . $separator . $params);
-		$body = $fetchResult->getBody();
-		$ret = $fetchResult->getReturnCode();
-
-		// give up if the HTTP return code wasn't a success (2xx)
-		if ($ret < 200 || $ret > 299) {
-			Logger::notice("Subscriber verification for $hub_topic at $hub_callback returned $ret, ignoring.");
-			throw new \Friendica\Network\HTTPException\NotFoundException();
-		}
-
-		// check that the correct hub_challenge code was echoed back
-		if (trim($body) !== $hub_challenge) {
-			Logger::notice("Subscriber did not echo back hub.challenge, ignoring.");
-			Logger::notice("\"$hub_challenge\" != \"".trim($body)."\"");
-			throw new \Friendica\Network\HTTPException\NotFoundException();
-		}
-
-		PushSubscriber::renew($owner['uid'], $nick, $subscribe, $hub_callback, $hub_topic, $hub_secret);
-
-		throw new \Friendica\Network\HTTPException\AcceptedException();
-	}
-	System::exit();
-}