Remove setuptools constraint

[gmarkall]

Based on and closes #105 with the setuptools constraint removed from setup.py in an attempt to make pip check succeed. I expect a further patch to some tests may be required.

Closes #104 too.

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[henryiii]

Why would tests need patching? Everything should be working again after the rollback in setuptools 65.0.2 or 65.1. I could be wrong, of course, but I'd expect it to work.

[gmarkall]

Why would tests need patching? Everything should be working again after the rollback in setuptools 65.0.2 or 65.1. I could be wrong, of course, but I'd expect it to work.

There are some tests that ensure that Numba import doesn't produce any warnings. I was concerned that the deprecation warning that suggests using setuptools < 60 might be produced by NumPy and cause this test to fail. Though, looking at the set of tests that run, we don't have a test with NumPy 1.23 in the list of configurations, so maybe we won't run into this issue 🤞

[henryiii]

Shouldn't we have a test with NumPy 1.23? :D

(not in this PR, but sounds like something that needs to be added then)

[gmarkall]

Yes, we should test with NumPy 1.23 - I was thinking of following up with that later once the dust has settled here.

[jakirkham]

cc @xhochy

[gmarkall]

Seems that the PPC builds are a bit close to the time limit and some of them timed out for this PR - do we just re-run tests when this happens?

[jakirkham]

Yep have restarted those jobs

[henryiii]

LGTM, anything left?

[jakirkham]

Thanks all! 🙏

Just a note, we are still seeing ppc64le builds hanging on main ( #102 ).