Remove usersettings

[donBarbos]

https://github.com/glvnst/usersettings

The last commit was in December 2020.
Stubs for usersettings were added in August 2023 (#10598) and have not changed since.
The stubs look complete and in a good place. Maybe it's time to finish the support in typeshed.

[JelleZijlstra]

The cost of removing these is that if a user finds an issue with the stubs later, we'll no longer be able to easily fix it and provide a new stubs package.

What is the benefit of removing the stubs?

[donBarbos]

Sorry, I didn't know about such cost of removing stubs.

I just thought that development was no longer active and I haven't seen a policy on why support in typeshed was being discontinued.

[Avasam]

I haven't seen a policy on why support in typeshed was being discontinued.

Here's the removal policy, as currently written: https://github.com/python/typeshed/blob/main/CONTRIBUTING.md#third-party-library-removal-policy

namely (emphasis mine)

the upstream package was declared or appears to be unmaintained, and retaining the stubs causes maintenance issues in typeshed.