Remove -- (leftovers from Yarn switch)

Editor assessment

The subject states the cleanup exactly: stray double-dash arguments removed, with the parenthetical attributing them to leftovers from the Yarn switch — motivation embedded in the headline. The chore type fits, and the absent scope is tolerable. No body is present, which is acceptable because the subject names the artifact, its origin, and its removal completely. The PR reference is well-formed. Imperative mood, no trailing period, compact length. A precise, self-sufficient cleanup message that needs no diff.