Unlink a pull request from an issue

Remove one exact fixing or suspected-cause relationship. Unlinking is idempotent and never removes a Sazabi Fix PR derived from a Fix request.

DELETE https://api.sazabi.com/v1/issues/{issueId}/pull-requests

curl -X DELETE "https://example.com/issues/497f6eca-6276-4993-bfeb-53cbbbba6f08/pull-requests" \  -H "Content-Type: application/json" \  -d '{    "url": "http://example.com",    "relation": "fixes"  }'

{  "removed": true}