docs: remove duplicate content

CONTRIBUTING.md

@@ -2,16 +2,6 @@
 
 This package is primarily maintained by [Prismic](https://prismic.io)[^1]. External contributions are welcome. Ask for help by [opening an issue](https://github.com/prismicio/prismic-client/issues/new/choose), or request a review by opening a pull request.
 
-<details><summary><strong>For Prismic employees</strong></summary><p>
-
-This package is maintained by the DevX team. Ask for help or a review in the [#team-devx](https://prismic-team.slack.com/archives/C014VAACCQL) Slack channel.
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-- It's highly recommended to discuss your changes with the DevTools team ([#team-dev-tools](https://prismic-team.slack.com/archives/CPG31MDL1)) before starting. A short discussion can accellerate your work and ship it faster.
-- Code should be reviewed by the DevTools team before merging. Request a review in the [#team-dev-tools](https://prismic-team.slack.com/archives/CPG31MDL1) Slack channel.
-- Ask the DevX team for [npm](https://www.npmjs.com) publish access.
-
-</p></details>
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 ## :gear: Setup
 
 <!-- When applicable, list system requriements to work on the project. -->