Remove unused receivers

[KAZYPinkSaurus]

What?

Remove unused receiver.
I hope this change helps you.

Checklist

• I have used a meaningful title for the PR.
• I have described the changes I've made in the "What?" section above.
• I have performed a self-review of my changes.
• I have run the npm start command locally and verified that the changes look good.

• I have made my changes in the docs/sources/next folder of the documentation.
• I have reflected my changes in the docs/sources/v{most_recent_release} folder of the documentation.
• I have reflected my changes in the relevant folders of the two previous k6 versions of the documentation (if still applicable to previous versions).

• I have made my changes in the docs/sources/next folder of the documentation.

Related PR(s)/Issue(s)

nothing.

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[heitortsergent]

Hi @KAZYPinkSaurus! Thanks for the contribution, and sorry I missed this when you first opened it.

It looks like we made some changes to these files, would you mind merging main to your branch? And if you don't mind, we require people to sign the CLA before we can accept any contributions, you can view the document and sign it in the link from the comment above.

Thanks! 🙇