[docs] Cleanup old releases page rehype

[mj12albert]

Not needed in the new design

• I have followed (at least) the PR section of the contributing guide.

[pkg-pr-new]

• base-ui-tanstack-start

• vite-css-base-ui-example

  pnpm add https://pkg.pr.new/@base-ui/react@4081
  

  pnpm add https://pkg.pr.new/@base-ui/utils@4081
  

commit: c4dc279

[mui-bot]

Bundle size report

Bundle	Parsed size	Gzip size
@base-ui/react	0B(0.00%)	0B(0.00%)

Details of bundle changes

---

Check out the code infra dashboard for more information about this PR.

[greptile-apps]

Greptile Overview

Greptile Summary

Removes the obsolete rehype logic that was used to generate semver-prefixed heading IDs for the old releases page structure. The releases page now uses a visual timeline (ReleaseTimeline component) with individual pages for each release, making this heading transformation logic unnecessary.

Issues found:

• The SEMVER_PATTERN constant (lines 40-41) is now unused and should be removed
• The EXIT import (line 4) is no longer needed after removing the releases page logic
• docs/src/components/Search/SearchBar.tsx still contains related code that expects the old releases page ID format (lines 20-38), which may need cleanup in a follow-up

Confidence Score: 3/5

• Safe to merge with minor cleanup recommended
• The change correctly removes obsolete code for the old releases page design. However, it leaves behind unused imports and constants (EXIT, SEMVER_PATTERN) that should be cleaned up, and there's related code in SearchBar.tsx that may also need updating
• Pay attention to docs/src/components/QuickNav/rehypeConcatHeadings.mjs for the unused constant and import

Important Files Changed

Filename	Overview
docs/src/components/QuickNav/rehypeConcatHeadings.mjs	Removes obsolete releases page rehype logic; leaves unused SEMVER_PATTERN constant and related search code

_{Last reviewed commit: 2c21442}

[greptile-apps]

_{1 file reviewed, 2 comments}

_{Edit Code Review Agent Settings | Greptile}

[greptile-apps]

Additional Comments (2)

docs/src/components/QuickNav/rehypeConcatHeadings.mjs
SEMVER_PATTERN constant is now unused after removing the releases page logic and should be deleted

Prompt To Fix With AI

This is a comment left during a code review.
Path: docs/src/components/QuickNav/rehypeConcatHeadings.mjs
Line: 38:41

Comment:
`SEMVER_PATTERN` constant is now unused after removing the releases page logic and should be deleted

```suggestion
```

How can I resolve this? If you propose a fix, please make it concise.

---

docs/src/components/QuickNav/rehypeConcatHeadings.mjs
EXIT import is no longer used after removing the releases page logic

import { headingRank } from 'hast-util-heading-rank';
import { toString } from 'hast-util-to-string';
import { visit, CONTINUE } from 'unist-util-visit';
import { stringToUrl } from './rehypeSlug.mjs';

Prompt To Fix With AI

This is a comment left during a code review.
Path: docs/src/components/QuickNav/rehypeConcatHeadings.mjs
Line: 1:5

Comment:
`EXIT` import is no longer used after removing the releases page logic

```suggestion
import { headingRank } from 'hast-util-heading-rank';
import { toString } from 'hast-util-to-string';
import { visit, CONTINUE } from 'unist-util-visit';
import { stringToUrl } from './rehypeSlug.mjs';
```

How can I resolve this? If you propose a fix, please make it concise.