Revert "ci/compare: Bring back nix stats comparison"

[hsjobeki]

Reverts #395113

[infinisil]

https://github.com/NixOS/nixpkgs/actions/runs/14783264902/job/41507002379?pr=391544

[nixpkgs-ci]

Backport failed for release-24.11, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally and resolve any conflicts.

git fetch origin release-24.11
git worktree add -d .worktree/backport-403448-to-release-24.11 origin/release-24.11
cd .worktree/backport-403448-to-release-24.11
git switch --create backport-403448-to-release-24.11
git cherry-pick -x a3520e957782c879440560180cd25c967d54364f

[asymmetric]

https://github.com/NixOS/nixpkgs/actions/runs/14783264902/job/41507002379?pr=391544

Is that the reason the commit got reverted? Or is there some context somewhere? Just for future reference/curiosity :)

[hsjobeki]

Is that the reason the commit got reverted? Or is there some context somewhere? Just for future reference/curiosity :)

Yeah there was some problem. It was merged later with this PR.
#404731

Some Problems:

• A directoy was a link and need to be resolved by realpath, for some reason python pathlib couldn't resolve it
• In some edge cases during the transition phase one of the compared sources could not have the required stats, handled this gracefully, where it was a hard error before and made the CI fail.