Remove mosquitto

This service is not used anymore.

hosts/magnesium/ports.nix

@@ -7,7 +7,6 @@ custom-utils.validatePortAttrset {
   coturn-tls = { tcp = [ 5349 5350 ]; udp = [ 5349 5350 ]; };
   forgejo-ssh.tcp = 2022;
   hedgedoc.tcp = 3000;
-  mosquitto.tcp = 1883;
   nginx-http.tcp = 80;
   nginx-https.tcp = 443;
   ntfy.tcp = 12474;

hosts/magnesium/services/default.nix

@@ -4,7 +4,6 @@
     ./forgejo.nix
     ./gitlab-runner.nix
     ./hedgedoc.nix
-    ./mosquitto.nix
     ./ntfy.nix
     ./public-ip-tunnel.nix
     ./webserver.nix

hosts/magnesium/services/mosquitto.nix

@@ -1,20 +0,0 @@
-args@{ config, lib, pkgs, custom-utils, ... }:
-
-let
-  ports = import ../ports.nix args;
-in
-{
-  services.mosquitto = {
-    enable = true;
-    persistence = true;
-    listeners = [
-      {
-        port = ports.mosquitto.tcp;
-        settings = {
-          allow_anonymous = true;
-        };
-      }
-    ];
-  };
-  networking.firewall.allowedTCPPorts = [ ports.mosquitto.tcp ];
-}