remove unnecessary 'setuptools' dependency

[jameslamb]

Contributes to rapidsai/build-planning#62.

It looks like this some of the kvikio conda package recipe has an unnecessary dependency on setuptools. I suspect that's left over from before the project was cut over to scikit-build-core.

This proposes removing it.

Notes for Reviewers

How I confirmed there were no direct uses of setuptools in this project:

git grep -i setuptools

[madsbk]

There is a reference to setuptools here: https://github.com/rapidsai/kvikio/blob/branch-24.08/ci/release/update-version.sh#L27

[jameslamb]

There is a reference to setuptools here:

Thanks for checking!

I believe those update-version.sh scripts are run manually by ops when cutting new release branches (@raydouglass or @AyodeAwe could confirm), and that they don't rely on projects' dependency metadata (conda recipes, pyproject.toml, dependencies.yaml) to provide it.

[jameslamb]

Thanks for your attention to detail @madsbk ... based on @AyodeAwe 's 👍🏻 on #385 (comment), I think this is safe to merge and the setuptools reference in update-version.sh should remain where it is.

[jameslamb]

/merge