outputs; update-list: remove

not needed with flakes

outputs.nix

@@ -78,30 +78,6 @@ self = {
       builtins.attrValues
       builtins.listToAttrs
     ];
-  # FIXME: currently impure
-  # NOTE: to run, you need to evaluate outputs.nix instead of default.nix
-  #       nix-shell outputs.nix -A update
-  update = let
-    updateScript = (self.packagesForSystem (builtins.currentSystem)).den-update-script;
-  in updateScript {
-    path = "";
-    packages = lib.pipe ./update-list.nix [
-      import
-      (x: x self)
-      lib.attrsToList
-      (lib.imap1 (i: {name, value}: {
-        name = builtins.toString i;
-        value = value // {
-          # hack to pass isDerivation check in nixpkgs maintainers/scripts/update.nix
-          # https://github.com/NixOS/nixpkgs/blob/a1185f4064c18a5db37c5c84e5638c78b46e3341/maintainers/scripts/update.nix#L85
-          type = "derivation";
-          name = name;
-        };
-      }))
-      builtins.listToAttrs
-      lib.recurseIntoAttrs
-    ];
-  };
 };
 
 in self