Use importlib.metadata on all python versions >3.8

[jakkdl]

Since importlib.metadata is available since python>3.8, there's no reason to use importlib_metadata in those versions and require users to install an additional dependency. I think it should be as simple as modifying

keyring/keyring/py312compat.py

Line 7 in 19374c6

if sys.version_info > (3, 12):

and

keyring/setup.cfg

Line 25 in 3f29ffb

importlib_metadata >= 4.11.4; python_version < "3.12"

[jaraco]

Thanks for the request.

there's no reason to use importlib_metadata

Unfortunately, that's not correct. If you look at the last commit on py312compat.py, you'll be taken to #526, where you can see that importlib_metadata was bumped to solve a particular issue.