jirafeau: remove davidtwco as maintainer

nixos/tests/jirafeau.nix

···
 
   {
     name = "jirafeau";
-    meta.maintainers = with lib.maintainers; [ davidtwco ];
+    meta.maintainers = [ ];
 
     nodes.machine =
       { pkgs, ... }:

pkgs/by-name/ji/jirafeau/package.nix

···
     license = licenses.agpl3Plus;
     homepage = "https://gitlab.com/mojo42/Jirafeau";
     platforms = platforms.all;
-    maintainers = with maintainers; [ davidtwco ];
+    maintainers = [ ];
   };
 }