Remove duplicated bits in `Lib/test/clinic.test.c`

[picnixz]

Feature or enhancement

Proposal:

We have some duplicated bits in Lib/test/clinic.test.c. This file should only consist of clinic directives and no actual code as it's never compiled (it will never compile as we never implement the functions). We have some code that just duplicates what clinic actually does.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• gh-131652: remove duplicated bits in Lib/test/clinic.test.c #131653