Remove `prefer-wait-for` rule

[Belco90]

Remove prefer-wait-for rule, since wait, waitForElement and waitForDomChange have been removed already

[github-actions]

🎉 This issue has been resolved in version 6.0.0-alpha.1 🎉

The release is available on:

• npm package (@alpha dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[Belco90]

I just realized there are other rules like prefer-find-by that are still checking these async methods. I'm going to add another ticket to check other places and remove such checks for removed async utils.