remove sieve completely

nixos-mailserver/dovecot.nix

@@ -13,7 +13,7 @@ let
     default_internal_user = ${config.services.dovecot2.user}
     default_internal_group = ${config.services.dovecot2.group}
     default_vsz_limit = 1024 M
-    protocols = imap lmtp sieve
+    protocols = imap lmtp
 
     ssl = yes
     ssl_cert = </var/lib/acme/dovecot2.${config.services.mymailserver.mailFQDN}/fullchain.pem
@@ -65,10 +65,6 @@ let
       }
     }
 
-    protocol lmtp {
-      mail_plugins = sieve
-    }
-
     protocol imap {
       mail_plugins = $mail_plugins
     }