Re-enable unexpected_cfgs

[ChrisDenton]

This is an attempt to re-enable unexpected_cfgs using the new unexpected_cfgs config in Cargo.toml. This avoids the need for a build script while still checking for typos in global cfgs.

[ChrisDenton]

Hm, looks like it isn't enough to just add it to the workspace lint table.

[kennykerr]

Well that's less bad. 🥲 Thanks Chris!

[kennykerr]

Hmm, noticing a bunch of warnings in local builds now.

warning: D:\git\windows-rs\crates\tests\calling_convention\Cargo.toml: unused manifest key: lints.rust.unexpected_cfgs.check-cfg
warning: D:\git\windows-rs\crates\tests\debugger_visualizer\Cargo.toml: unused manifest key: lints.rust.unexpected_cfgs.check-cfg
warning: D:\git\windows-rs\Cargo.toml: unused manifest key: workspace.lints.rust.unexpected_cfgs.check-cfg

Looks like this is only on stable and goes away on nightly. Is that expected?

[ChrisDenton]

Oh. Hm. Looks like this is expected on stable. A fix to silence the warnings was backported to beta but not current stable. So it will be an issue until the next release.