Summary

Following up on the effort I started in #9621, this PR removes more of the unused devDependencies from packages/eui/package.json:

• @elastic/charts - used on the old docs website to render charts examples
• @types/cheerio - it was added by me during React 18 upgrade (Add support for React 18 #7012) to resolve Enzyme type errors. It's not needed anymore
• react-router-dom - used by the old docs website
• cache-loader, raw-loader, style-loader, cache-loader, file-loader, postcss-loader, sass-loader - used by the old docs website
• circular-dependency-plugin, fork-ts-checker-webpack-plugin, html-webpack-plugin, terser-webpack-plugin, uglifyjs-webpack-plugin - used by the old docs website
• get-port, html-format - used by the old docs website

API Changes

N/A

Screenshots

N/A

Impact Assessment

Note: Most PRs should be tested in Kibana to help gauge their Impact before merging.

• 🔴 Breaking changes — What will break? How many usages in Kibana/Cloud UI are impacted?
• 💅 Visual changes — May impact style overrides; could require visual testing. Explain and estimate impact.
• 🧪 Test impact — May break functional or snapshot tests (e.g., HTML structure, class names, default values).
• 🔧 Hard to integrate — If changes require substantial updates to Kibana, please stage the changes and link them here.

Impact level: 🟢 None

Release Readiness

• Documentation: {link to docs page(s)}
• Figma: {link to Figma or issue}
• Migration guide: {steps or link, for breaking/visual changes or deprecations}
• Adoption plan (new features): {link to issue/doc or outline who will integrate this and where}

QA instructions for reviewer

• Confirm that the documentation website builds properly
• Confirm that CI is passing
• Confirm that the removed devDependencies are not used anywhere in EUI

Checklist before marking Ready for Review

• Filled out all sections above
• QA: Tested light/dark modes, high contrast, mobile, Chrome/Safari/Edge/Firefox, keyboard-only, screen reader
• QA: Tested in CodeSandbox and Kibana
• QA: Tested docs changes
• Tests: Added/updated Jest, Cypress, and VRT
• Changelog: Added changelog entry
• Breaking changes: Added breaking change label (if applicable)

Reviewer checklist

• Approved Impact Assessment — Acceptable to merge given the consumer impact.
• Approved Release Readiness — Docs, Figma, and migration info are sufficient to ship.