Replace _finite with std::isfinite

[GravisZro]

Pull Request Type

• [x] Runtime changes
  • [x] Other changes

Description

std::isfinite is a drop in replacement for _finite that is multiplatform which means the definition in linux_fix.h is no longer required.

Checklist

• [x] I have tested my changes locally and verified that they work as intended.
• [x] I have documented any new or modified functionality.
• [x] I have reviewed the changes to ensure they do not introduce any unnecessary complexity or duplicate code.
• [x] I understand that by submitting this pull request, I am agreeing to license my contributions under the project's license.

[winterheart]

No issues on Linux, ready to merge.