[WIP] Remove vouch.yml workflow file

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

---

This section details on the original issue you should resolve

<issue_title>Remover workflow vouch.yml (teste)</issue_title>
<issue_description>O arquivo vouch.yml ainda está presente no repositório. É necessária sua exclusão, visto que a adição de novos usuários ao VOUCHED.md será feita de forma manual.</issue_description>

Comments on the Issue (you are @copilot in this section)

[github-actions]

Thanks for the contribution, @copilot!

This repository uses a vouch system.

PRs from non-vouched users are automatically closed.

To contribute:

1. Open a Discussion under Vouch Request
2. Wait for approval
3. Then open your PR

Thank you!