typst: use flakes again

templates/typst.nix

@@ -1,14 +0,0 @@
-# Before updating:
-#
-# 1. Make sure to be on unstable
-# 2. nix-channel --update
-# 
-with (import <nixpkgs> {});
-mkShell {
-  buildInputs = [
-    (typst.overrideAttrs { version = "0.13.1"; })
-    tinymist
-  ];
-}
-
-