Removal of mold/wild scripts and mentions in docs (#53078)

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [ ] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [ ] Tests cover the new/changed behavior
- [ ] Performance impact has been considered and is acceptable


Release Notes:

- N/A

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

.github/actions/build_docs/action.yml

@@ -19,10 +19,6 @@ runs:
       shell: bash -euxo pipefail {0}
       run: ./script/linux
 
-    - name: Install mold linker
-      shell: bash -euxo pipefail {0}
-      run: ./script/install-mold
-
     - name: Download WASI SDK
       shell: bash -euxo pipefail {0}
       run: ./script/download-wasi-sdk