diff --git a/mod/salmon.php b/mod/salmon.php
deleted file mode 100644
index a4eb3f81e..000000000
--- a/mod/salmon.php
+++ /dev/null
@@ -1,183 +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\Protocol;
-use Friendica\Database\DBA;
-use Friendica\DI;
-use Friendica\Model\GServer;
-use Friendica\Model\Post;
-use Friendica\Protocol\ActivityNamespace;
-use Friendica\Protocol\OStatus;
-use Friendica\Protocol\Salmon;
-use Friendica\Util\Crypto;
-use Friendica\Util\Network;
-use Friendica\Util\Strings;
-
-function salmon_post(App $a, $xml = '') {
-
-	if (empty($xml)) {
-		$xml = Network::postdata();
-	}
-
-	Logger::debug('new salmon ' . $xml);
-
-	$nick = trim(DI::args()->getArgv()[1] ?? '');
-
-	$importer = DBA::selectFirst('user', [], ['nickname' => $nick, 'account_expired' => false, 'account_removed' => false]);
-	if (! DBA::isResult($importer)) {
-		throw new \Friendica\Network\HTTPException\InternalServerErrorException();
-	}
-
-	// parse the xml
-
-	$dom = simplexml_load_string($xml,'SimpleXMLElement',0, ActivityNamespace::SALMON_ME);
-
-	$base = null;
-
-	// figure out where in the DOM tree our data is hiding
-	if (!empty($dom->provenance->data))
-		$base = $dom->provenance;
-	elseif (!empty($dom->env->data))
-		$base = $dom->env;
-	elseif (!empty($dom->data))
-		$base = $dom;
-
-	if (empty($base)) {
-		Logger::notice('unable to locate salmon data in xml');
-		throw new \Friendica\Network\HTTPException\BadRequestException();
-	}
-
-	// Stash the signature away for now. We have to find their key or it won't be good for anything.
-
-
-	$signature = Strings::base64UrlDecode($base->sig);
-
-	// unpack the  data
-
-	// strip whitespace so our data element will return to one big base64 blob
-	$data = str_replace([" ","\t","\r","\n"],["","","",""],$base->data);
-
-	// stash away some other stuff for later
-
-	$type = $base->data[0]->attributes()->type[0];
-	$keyhash = $base->sig[0]->attributes()->keyhash[0] ?? '';
-	$encoding = $base->encoding;
-	$alg = $base->alg;
-
-	// Salmon magic signatures have evolved and there is no way of knowing ahead of time which
-	// flavour we have. We'll try and verify it regardless.
-
-	$stnet_signed_data = $data;
-
-	$signed_data = $data  . '.' . Strings::base64UrlEncode($type) . '.' . Strings::base64UrlEncode($encoding) . '.' . Strings::base64UrlEncode($alg);
-
-	$compliant_format = str_replace('=', '', $signed_data);
-
-
-	// decode the data
-	$data = Strings::base64UrlDecode($data);
-
-	$author = OStatus::salmonAuthor($data, $importer);
-	$author_link = $author["author-link"];
-
-	if(! $author_link) {
-		Logger::notice('Could not retrieve author URI.');
-		throw new \Friendica\Network\HTTPException\BadRequestException();
-	}
-
-	// Once we have the author URI, go to the web and try to find their public key
-
-	Logger::notice('Fetching key for ' . $author_link);
-
-	$key = Salmon::getKey($author_link, $keyhash);
-
-	if(! $key) {
-		Logger::notice('Could not retrieve author key.');
-		throw new \Friendica\Network\HTTPException\BadRequestException();
-	}
-
-	$key_info = explode('.',$key);
-
-	$m = Strings::base64UrlDecode($key_info[1]);
-	$e = Strings::base64UrlDecode($key_info[2]);
-
-	Logger::info('key details', ['info' => $key_info]);
-
-	$pubkey = Crypto::meToPem($m, $e);
-
-	// We should have everything we need now. Let's see if it verifies.
-
-	// Try GNU Social format
-	$verify = Crypto::rsaVerify($signed_data, $signature, $pubkey);
-	$mode = 1;
-
-	if (! $verify) {
-		Logger::notice('message did not verify using protocol. Trying compliant format.');
-		$verify = Crypto::rsaVerify($compliant_format, $signature, $pubkey);
-		$mode = 2;
-	}
-
-	if (! $verify) {
-		Logger::notice('message did not verify using padding. Trying old statusnet format.');
-		$verify = Crypto::rsaVerify($stnet_signed_data, $signature, $pubkey);
-		$mode = 3;
-	}
-
-	if (! $verify) {
-		Logger::notice('Message did not verify. Discarding.');
-		throw new \Friendica\Network\HTTPException\BadRequestException();
-	}
-
-	Logger::notice('Message verified with mode '.$mode);
-
-
-	/*
-	*
-	* If we reached this point, the message is good. Now let's figure out if the author is allowed to send us stuff.
-	*
-	*/
-
-	$contact = DBA::selectFirst('contact', [], ["`network` IN (?, ?) AND (`nurl` = ? OR `alias` = ? OR `alias` = ?) AND `uid` = ?",
-		Protocol::OSTATUS, Protocol::DFRN, Strings::normaliseLink($author_link), $author_link, Strings::normaliseLink($author_link), $importer['uid']]);
-
-	if (!empty($contact['gsid'])) {
-		GServer::setProtocol($contact['gsid'], Post\DeliveryData::OSTATUS);
-	}
-
-	// Have we ignored the person?
-	// If so we can not accept this post.
-
-	if (!empty($contact['blocked'])) {
-		Logger::notice('Ignoring this author.');
-		throw new \Friendica\Network\HTTPException\AcceptedException();
-	}
-
-	// Placeholder for hub discovery.
-	$hub = '';
-
-	$contact = $contact ?: [];
-
-	OStatus::import($data, $importer, $contact, $hub);
-
-	throw new \Friendica\Network\HTTPException\OKException();
-}