deskutils/py-vit: Update 2.3.3 => 2.3.4

Changelog:
https://github.com/vit-project/vit/releases/tag/v2.3.4

Port changes:

• Remove unneeded GH_PROJECT.
• Remove extra arguments from USES=python.

PR: 294252
Reported by: Thierry Dussuet <thierry.dussuet@protonmail.com> (maintainer)
Approved by: maintainer, vvd (co-mentor)