Omit backports.entry_points_selectable for Python >=3.10

[Chocimier]

If I understood backports.entry_points_selectable documentation correctly, this is equivalent.
Change is proposed to update above 20.4.7 on Void Linux, which is on python 3.10 already, without fuss of adding the backport module to repository.

• ran the linter to address style issues (tox -e fix_lint)
• wrote descriptive pull request text
• ensured there are test(s) validating the fix
• added news fragment in docs/changelog folder
• updated/extended the documentation

[hroncok]

Thank you!

[gaborbernat]

Can you add this as a feature please and not misc; misc basically reserved for project maintenance files only, not that affects code.

[gaborbernat]

Also, can we drop backports.entry_points_selectable entirely here?

[hroncok]

I suppose we can if we require importlib-metadata>=3.6;python_version<"3.10" and do:

if sys.version_info >= (3, 10):
    from importlib.metadata import entry_points
else:
    from importlib_metadata import entry_points

-- not sure if that is much better.

[gaborbernat]

Alternatively can we use the old API on old pythons and the new API on new Pythons? Rather than try to use the same?

[hroncok]

Like this? #2241

[Chocimier]

Added as feature. The other PR would fit my needs as well.

[gaborbernat]

I prefer 2241, so will be closing this.