fix(create): SKILL.md says a same-folder create waits (#63); drop unused import (Issue #68, review)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VCgu9Fa9iT7TbJUSzdq4Ff

tests/test_issue68_onboard_default.py

@@ -14,7 +14,6 @@ import time
 from pathlib import Path
 
 import pytest
-import yaml
 
 REPO_ROOT = Path(__file__).resolve().parent.parent
 SKILLS = REPO_ROOT / ".agents" / "skills"