sbomnix: use the latest Nix version in $PATH again

Undoes the previous workaround for the new JSON derivation format,
which pinned the runtime Nix version to 2.31.

As sbomnix no longer supports the legacy derivation format starting
with 1.8.0 and the new JSON format is only available starting with
Nix 2.33, now the workaround causes sbomnix to fail.

pkgs/by-name/sb/sbomnix/package.nix

@@ -4,7 +4,6 @@
   git,
   grype,
   nix,
-  nixVersions,
   nix-visualize,
   python3,
   vulnix,
@@ -31,9 +30,7 @@ python3.pkgs.buildPythonApplication (finalAttrs: {
     "--prefix PATH : ${
       lib.makeBinPath [
         git
-        # nix
-        # TODO: remove once sbomnix support new JSON format: https://github.com/tiiuae/sbomnix/issues/267
-        nixVersions.nix_2_31
+        nix
         python3.pkgs.graphviz
         nix-visualize
         vulnix