Remove deprecated license classifier

[thisac]

Setuptools>=77 now raises

setuptools.errors.InvalidConfigError: License classifiers have been superseded by license expressions (see https://peps.python.org/pep-0639/). Please remove:

      License :: OSI Approved :: Apache Software License

since its deprecation. See PEP 639 and #4833 for details.

[randomir]

LGTM!

But the new setuptools behavior screams bug to me! Zero grace period / deprecation period -- but immediate build error! The PEP says the tools MAY raise an error.. So the better approach would be they first raised a warning, then turned it into an error...

[thisac]

So the better approach would be they first raised a warning, then turned it into an error...

Completely agree with that! Also understood it as optional, but the error is there and this fix isn't really intrusive. 🫤

[randomir]

So the better approach would be they first raised a warning, then turned it into an error...

Completely agree with that! Also understood it as optional, but the error is there and this fix isn't really intrusive. 🫤

Also, they only raise a warning under the same conditions if the config is in setup.cfg/setup.py:

SetuptoolsDeprecationWarning: License classifiers are deprecated.

and raise an error if pyproject.toml is used.