fix: remove unnecessary files and update tests

[keito4]

This PR addresses issue #157 by removing unnecessary code from the repository.

Changes:

• Removed empty git/gitattributes file
• Removed placeholder .claude/commands/security-review.md file
• Updated test suite to reflect removed files
• Updated package-lock.json after dependency installation

Verification:

• All tests passing (17/17)
• No breaking changes
• Code formatting and linting checks passed

Closes #157

Generated with Claude Code

Summary by CodeRabbit

• Chores

  • Removed instruction from security review configuration.

• Tests

  • Removed test case for gitattributes file validation, streamlining configuration testing suite.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

This pull request removes unnecessary code and test assertions. A Japanese instruction prompt is deleted from the security-review configuration file, and a test that checks for gitattributes file existence is removed from the validation test suite.

Changes

Cohort / File(s)	Summary
Configuration cleanup .claude/commands/security-review.md	Removed Japanese instruction prompt "このコードを10個の改善案を出してください。" requesting ten code improvement suggestions
Test cleanup test/config-validation.test.js	Removed test assertion checking for the existence of git/gitattributes file in Git configuration validation suite

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

• Both changes are straightforward deletions with no new logic or dependencies
• No control flow modifications or behavioral changes
• Simple, direct removal of unused/outdated code

Possibly related PRs

• feat: Claude設定管理の強化とパッケージ更新 #156: Directly related—this PR undoes the introduction of the Japanese instruction line that PR #156 added to .claude/commands/security-review.md

Suggested labels

released

Poem

🐰 A cleanup quest, so neat and bright,
Old prompts fade, old tests take flight,
The codebase slims, now lean and light,
Unnecessary burdens freed—what a delight! ✨

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch claude/issue-157-20251204-0301

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 3b2a02f and 5c1d2b8.

⛔ Files ignored due to path filters (1)

• package-lock.json is excluded by !**/package-lock.json

📒 Files selected for processing (2)

• .claude/commands/security-review.md (0 hunks)
• test/config-validation.test.js (0 hunks)

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[github-actions]

🎉 This PR is included in version 1.2.1 🎉

The release is available on GitHub release

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