docs: removes ploomber deployment

[julianpistorius]

📝 Summary

Ploomber was introduced as a deployment option in PR #1426.

The Ploomber cloud platform shut down on 2025-10-31:

https://ploomber.io/blog/platform-shut-down/

The Marimo deploying guide still has an entry for Ploomber:

https://docs.marimo.io/guides/deploying/

(Permalink)

The link for the deployment instructions is broken:

https://docs.cloud.ploomber.io/en/latest/apps/marimo.html

🔍 Description of Changes

Removed the Ploomber page from the deploying guide.

📋 Checklist

• I have read the contributor guidelines.
• For large changes, or changes that affect the public API: this change was discussed or approved through an issue, on Discord, or the community discussions (Please provide a link if applicable). N/A
• Tests have been added for the changes made. N/A
• Documentation has been updated where applicable, including docstrings for API changes.
• Pull request title is a good summary of the changes - it will be used in the release notes.

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Project	Deployment	Actions	Updated (UTC)
marimo-docs	Ready	Preview, Comment	Feb 9, 2026 11:47pm

[github-actions]

All contributors have signed the CLA ✍️ ✅
_{Posted by the CLA Assistant Lite bot.}

[julianpistorius]

I have read the CLA Document and I hereby sign the CLA

[github-actions]

🚀 Development release published. You may be able to view the changes at https://marimo.app?v=0.19.10-dev24