[doc] chore: remove duplicate moe-comm-overlap skill

[yaoyu-33]

Summary

• Removed the moe-comm-overlap skill (SKILL.md + card.yaml) which was fully subsumed by the more thorough expert-parallel-overlap skill
• Cleaned up stale links in docs/skills-index.md (toctree entry) and docs/training/communication-overlap.md (related-docs links)

Test plan

• Verify docs/skills-index.md toctree renders without broken references
• Verify docs/training/communication-overlap.md related-docs links are all valid

Made with Cursor

Summary by CodeRabbit

• Documentation
  • Removed comprehensive documentation for the MoE expert-parallel communication overlap optimization feature from the performance techniques section, including detailed information on configuration flags, prerequisites, system constraints, common pitfalls, and verification procedures.
  • Removed associated metadata and updated navigation references accordingly.

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[yaoyu-33]

/ok to test 0c26d75

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 949bc659-2de2-413a-b67b-ff62d67d7ddc

📥 Commits

Reviewing files that changed from the base of the PR and between 3980ce4 and 0c26d75.

📒 Files selected for processing (4)

• docs/skills-index.md
• docs/training/communication-overlap.md
• skills/perf-techniques/moe-comm-overlap/SKILL.md
• skills/perf-techniques/moe-comm-overlap/card.yaml

💤 Files with no reviewable changes (4)

• docs/skills-index.md
• skills/perf-techniques/moe-comm-overlap/card.yaml
• docs/training/communication-overlap.md
• skills/perf-techniques/moe-comm-overlap/SKILL.md

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📝 Walkthrough

Walkthrough

Removed MoE expert-parallel communication overlap skill documentation and metadata from the documentation structure, including deletion of the SKILL.md and card.yaml files and removal of all references from navigation indices and related documentation.

Changes

Cohort / File(s)	Summary
Documentation Index & References docs/skills-index.md, docs/training/communication-overlap.md	Removed toctree entry and documentation links referencing the MoE expert-parallel overlap skill from navigation and training documentation.
Skill Documentation & Metadata skills/perf-techniques/moe-comm-overlap/SKILL.md, skills/perf-techniques/moe-comm-overlap/card.yaml	Deleted skill documentation file describing MoE expert-parallel communication overlap configuration and validation approach, and removed associated YAML card metadata containing skill summary, validation status, feature definitions, and constraints.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: removing the duplicate moe-comm-overlap skill documentation and references.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Test Results For Major Changes	✅ Passed	PR contains only minor documentation cleanup and removal of duplicate skill files with no code functionality changes, new features, or breaking changes.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch yuya/remove-duplicate-moe-comm-overlap-skill

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