Permanently deletes a skill. Returns SKILL_HAS_MEMBERS (409) if any active technicians are still assigned — unassign all technicians first.
curl -X DELETE "https://api.crisphive.com/v1/skills/9b2f6c3e-1a4d-4f0a-8f2e-7c5d1b3a9e01" \ -H "Authorization: Bearer chsk_test_4eC8xQ9mZ2pL7Ka0rT"