Remove Langsmith-observability stack from docs

[Romain Priour (romain-priour-lc)]

Overview

Chart is being deprecated

Type of change

Type:
Remove outdated content

Related issues/PRs

Closes INF-1678

Checklist

• I have read the contributing guidelines
• I have tested my changes locally using docs dev
• All code examples have been tested and work correctly
• I have used root relative paths for internal links
• I have updated navigation in src/docs.json if needed

Additional notes

😢

[github-actions]

❌ Removed pages require redirects

This PR removes pages from docs.json without adding corresponding redirects. When pages are removed from the navigation, existing links and bookmarks will break unless redirects are added.

 The following pages were removed from docs.json without adding redirects:
  - langsmith/observability-stack

Please add a redirect for each removed page to the `redirects` array in docs.json.
Example: {"source": "/path/to/removed-page", "destination": "/path/to/new-location"}
Add these to the `redirects` array in src/docs.json.

[github-actions]

Mintlify preview ID generated: preview-romain-1772847038-b1b459f

[github-actions]

Mintlify preview ID generated: preview-romain-1773067729-d279c0c