Common/helix: use home-manager languages option

roles/common/programs/helix.nix

@@ -25,17 +25,14 @@
           indent-guides.render = true;
         };
       };
+      languages = {
+        language = [
+          {
+            name = "nix";
+            formatter.command = "nixpkgs-fmt";
+          }
+        ];
       };
-    # The builtin languages options have issues
-    # https://github.com/nix-community/home-manager/issues/3299
-    xdg.configFile."helixLanguages" = {
-      target = "helix/languages.toml";
-      text = ''
-        [language-server.nil]
-        config.nil.formatting.command = [ "nixpkgs-fmt" ]
-        [[language]]
-        name = "nix"
-      '';
     };
   };
 }