docs(showcase): remove sites not using Docusaurus anymore

[GatienBoquet]

Pre-flight checklist

• I have read the Contributing Guidelines on pull requests.
• If this is a code change: I have written unit tests and/or added dogfooding pages to fully verify the new behavior.
• If this is a new API or substantial change: the PR has an accompanying issue (closes #0000) and the maintainers have approved on my working plan.

Motivation

This PR addresses the issue of non-compliant entries in the users.tsx file by removing links that are not using Docusaurus.
Twelve non-compliant entries were identified and removed.

I am aware of the ongoing PR adding a showcase plugin to check links, but as of now, there are incorrect links in the showcase, including some that direct to sites with potential malware.

I can address additional links problems in this PR if it's okay for you.

Test Plan

The changes were tested by verifying that each removed link no longer appears in the users.tsx file.
Additionally, I've ensured that the remaining links are correctly listed.

Related issues/PRs

#9967

Not Using Docusaurus

URL	Issue
https://benthos.dev/	Using Antora 3.1.2
https://docs.quantcdn.io	Using Astro v4.12.2
https://codesweetly.com/	Using Astro v4.12.3
https://miroiu.github.io/nodify/	Using Astro v4.5.9
https://outerbounds.com	Using Framer 04e0834
https://cipp.app	Using Hugo 0.111.3
https://wiki-power.com/	Using mkdocs-1.6.0, mkdocs-material-9.5.27
https://wiki.7wate.com/	Using Quartz
https://callstack.github.io/react-native-testing-library/	Using Rspress v1.20.1
https://docs.tuist.io/	Using VitePress v1.3.1
https://k3ai.in/	Using WordPress 6.6.1

Malware Link - DO NOT CLICK

URL	Description
https://axioms.io/	Axioms Developer Hub and Documentation Portal

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[github-actions]

⚡️ Lighthouse report for the deploy preview of this PR

URL	Performance	Accessibility	Best Practices	SEO	Report
/	🟠 69	🟢 98	🟢 96	🟢 100	Report
/docs/installation	🟠 55	🟢 97	🟢 100	🟢 100	Report
/docs/category/getting-started	🟠 74	🟢 100	🟢 100	🟠 86	Report
/blog	🟠 69	🟢 96	🟢 100	🟠 86	Report
/blog/preparing-your-site-for-docusaurus-v3	🔴 47	🟢 92	🟢 100	🟢 100	Report
/blog/tags/release	🟠 71	🟢 96	🟢 100	🟠 86	Report
/blog/tags	🟠 75	🟢 100	🟢 100	🟠 86	Report

[slorber]

Thanks for the maintenance help 👍

Let me know if there are others you want to remove before merge

[Josh-Cena]

I know that Hermes is no longer using Docusaurus (AFAIK), since their website just redirects to their GH.