Removed the usage of minor-version entrypoints

[UltimateLobster]

Unfortunatly, as discussed here: #13815. The feature is not implemented correctly as the global wheel has the entrypoints hard-coded to the minor version of the python used to create them. This PR will remove that third entrypoint.

Side note: I didn't see any github acftion to publish new versions of the package. Will it be ok if I create a new PR with one and if so, would it be acceptible if I make it so the github action would run on all supported minor versions of python to create a wheel that is aware of the minor version (so the feature would be able to be re-implemented)?

[Carreau]

I didn't see any github acftion to publish new versions of the package

No there is none,

I publish locally by signing the release commit with my local GPG key, and build the wheel twice to ensure that it's identical both time. The publish process also has a few step to push the wheel to a couple other archives.

See https://github.com/ipython/ipython/blob/6a4bff46d5bdcb231ed89cef1387cb7f2cccb271/tools/release_helper.sh

I'm happy to see improvements in the release process, but there are some of those steps i'm unsure how to integrate with GH action.