Remove deprecated python-freethreading option #63

Job	Run time
Build sdist	1m 4s
Repackage licenses in sdist for binary distribution	14s
Build wheels on macos-15-intel for x86_64	4m 17s
Build wheels on ubuntu-latest for x86_64	4m 15s
Build wheels on windows-11-arm for ARM64	4m 9s
Build wheels on ubuntu-24.04-arm for aarch64	3m 57s
Build wheels on macos-14 for arm64	4m 5s
Build wheels on windows-latest for AMD64	4m 10s
Publish release to TestPyPI	0s
Publish release to PyPI	-1s
Ensure commit is tag before upload to PyPi	-1s
	26m 9s

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