[desrosj]

This removes tests/gutenberg/, which was added in r48382 (#50469) to run Gutenberg's end-to-end tests against a Core checkout. The script was never added to an npm script or a CI workflow, and it no longer works:

• It crashes on startup. chalk v5+ is ESM-only, so require( 'chalk' ).bold is undefined and the script throws at line 51. That has been true since chalk was updated past v4.
• The Gutenberg branch it checks out is gone. It checks out Gutenberg's wp/trunk branch, and git ls-remote now only returns wp/latest.
• The test command it runs no longer exists. It runs npm run test-e2e packages/e2e-tests/specs/editor. Gutenberg has no test-e2e script (it's now test:e2e, which runs Playwright), and packages/e2e-tests/specs was removed in early 2024 when the Puppeteer tests moved to Playwright (Migrate 'autosave' e2e tests to Playwright gutenberg#58171).
• The Core build hook it relies on was already removed. It passes FORCE_REDUCED_MOTION=true to the Core build, but that webpack definition was removed in r56699.

Trac ticket: Core-65845.

Use of AI Tools

AI assistance: Yes
Tool(s): Claude Code
Model(s): Claude Opus 5.5
Used for: Investigating whether the script was still used, making the removal, and drafting the commit message and this description. I reviewed the changes.

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This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

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The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs.

Core Committers: Use this line as a base for the props when committing in SVN:

Props desrosj.

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[desrosj]

Merged in r65309.