docs(examples): remove dead link to removed sdk-trace-example

[feizhuzheng]

What is the current behavior?

The examples index (examples/README.md) lists an SDK Trace Example entry:

- [SDK Trace Example](./sdk-trace-example) — OpenTelemetry tracing wired to VoltOps so you can inspect spans and events.

But examples/sdk-trace-example/ no longer exists. It was deleted in commit 5aa84b5b (feat: add evals, #674), which removed all of its files (src/index.ts, README.md, .env.example, tsconfig.json, .gitignore). The relative link therefore 404s on GitHub, and there is no replacement example directory that covers OpenTelemetry tracing (searched all 87 example dirs — none match trace/observability/otel).

What is the new behavior?

Remove the stale entry so the examples index only points at examples that actually exist. One-line deletion, no other entries touched.

Verification

• curl of contents/examples/sdk-trace-example on main returns 404.
• The removed line is the only broken relative link in examples/README.md (every other ./… entry resolves to an existing directory).

Notes for reviewers

There is one more stale reference to the same removed example in a dated blog post (website/blog/2025-10-21-ai-agent-examples/index.md, links to .../tree/main/examples/sdk-trace-example). I left the blog untouched since it is point-in-time content — happy to update it too if you'd prefer.

Docs-only change (examples index), so no changeset or tests.

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Summary by cubic

Removes the dead SDK Trace Example entry from the examples index, since examples/sdk-trace-example/ was deleted and the link now 404s on GitHub.

^{Written for commit 5e1b6c0. Summary will update on new commits.}

Summary by CodeRabbit

• Documentation
  • Removed the SDK Trace Example from the list of available examples.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 5e1b6c0

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 1d780955-83bd-4650-8adc-b39104ac0649

📥 Commits

Reviewing files that changed from the base of the PR and between 44b4c8e and 5e1b6c0.

📒 Files selected for processing (1)

• examples/README.md

💤 Files with no reviewable changes (1)

• examples/README.md

Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review.

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📝 Walkthrough

Walkthrough

The examples README removes the SDK Trace Example entry from the “All Examples” list.

Changes

Examples documentation

Layer / File(s)	Summary
Remove SDK Trace listing examples/README.md	The “All Examples” list no longer includes ./sdk-trace-example.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to 5e1b6

This docs-only change removes a link to an example that no longer exists; no actionable merge-blocking risk remains after normal checks and review.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely identifies the documentation change: removing a dead link to the deleted SDK Trace Example.
Description check	✅ Passed	The description explains the current and new behavior, identifies the deleted directory, documents verification, and notes why tests and a changeset are not included. The checklist remains unchecked a…
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Description check

Explanation

The description explains the current and new behavior, identifies the deleted directory, documents verification, and notes why tests and a changeset are not included. The checklist remains unchecked and no related issue is linked, but the description is otherwise complete and directly related to the change.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[cubic-dev-ai]

No issues found across 1 file

_{Re-trigger cubic}