CI: validate.yml: remove the git workaround that started failing on Windows

[ulysses4ever]

I wanna see if this is still needed.

The failure looks like this:

Run git config --global protocol.file.allow always
error: could not lock config file C:/msys64/home/runneradmin/.gitconfig: No such file or directory
Error: Process completed with exit code 255.

e.g. https://github.com/haskell/cabal/actions/runs/16415578333/job/46397611829

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Template B: This PR does not modify behaviour or interface

E.g. the PR only touches documentation or tests, does refactorings, etc.

Include the following checklist in your PR:

• Patches conform to the coding conventions.
• Is this a PR that fixes CI? If so, it will need to be backported to older cabal release branches (ask maintainers for directions).

[ulysses4ever]

after all validate tests were smooshed into one github action step, I am positively unable to read the logs. Is anyone able to point me to the actual error message?

[geekosaur]

I'm confused, when did this change you mentioned happen? The only one I remember added folding output sections.

[ulysses4ever]

that one, yes