remove deprecated formatters

treefmt.nix

@@ -1,9 +1,9 @@
-{ lib, inputs, ... }: {
+{ inputs, ... }: {
   imports = [
     inputs.treefmt-nix.flakeModule
   ];
 
-  perSystem = { pkgs, ... }: {
+  perSystem = _: {
     treefmt = {
       # Used to find the project root
       projectRootFile = "flake.lock";
@@ -12,33 +12,17 @@
         deadnix.enable = true;
         deno.enable = true;
         mypy.enable = true;
+        ruff.check = true;
+        ruff.format = true;
         nixpkgs-fmt.enable = true;
         shellcheck.enable = true;
         shfmt.enable = true;
         statix.enable = true;
       };
 
-      settings.formatter =
-        let
-          sh-includes = [ "*.sh" "direnvrc" ];
-        in
-        {
-          python = {
-            command = "sh";
-            options = [
-              "-eucx"
-              ''
-                ${lib.getExe pkgs.ruff} --fix "$@"
-                ${lib.getExe pkgs.ruff} format "$@"
-              ''
-              "--" # this argument is ignored by bash
-            ];
-            includes = [ "*.py" ];
-          };
-
-          shellcheck.includes = sh-includes;
-
-          shfmt.includes = sh-includes;
+      settings.formatter = {
+        shellcheck.includes = [ "*.sh" "direnvrc" ];
+        shfmt.includes = [ "*.sh" "direnvrc" ];
       };
     };
   };