Remove deprecated configuration files for Cloudflare, minimal user setup, and msmtp

hosts/common/optional/acme/cloudflare.ini.example

@@ -1 +0,0 @@
-CF_DNS_API_TOKEN=

hosts/common/optional/minimal-user.nix

@@ -1,12 +0,0 @@
-{ config, ... }:
-{
-  # Set a temp password for use by minimal builds like installer and iso
-  users.users.${config.hostSpec.username} = {
-    isNormalUser = true;
-    password = config.hostSpec.password;
-    extraGroups = [
-      "wheel"
-      "ryot"
-    ];
-  };
-}

hosts/common/optional/msmtp.nix

@@ -1,22 +0,0 @@
-{ inputs, config, ... }:
-
-{
-  programs.msmtp = {
-    enable = true;
-    setSendmail = true; # set the system sendmail to msmtp's
-
-    accounts = {
-      "default" = {
-        host = "${config.hostSpec.email.msmtp-host}";
-        port = 587;
-        auth = true;
-        tls = true;
-        tls_starttls = true;
-        from = "${config.hostSpec.email.notifier}";
-        user = "${config.hostSpec.email.notifier}";
-        passwordeval = "cat ${config.sops.secrets."passwords/msmtp".path}";
-        logfile = "~/.msmtp.log";
-      };
-    };
-  };
-}