Since WebKit rebases and edits commit messages in merge-queue, we should explicitly disable commit signing in WebKit by default. Commit signing is actively misleading in WebKit, because of merge-queue, and may even be a considerable usability burden for contributors which need biometrics or other credentials to sign commits.
<rdar://problem/128477412>
Pull request: https://github.com/WebKit/WebKit/pull/28857
Committed 279068@main (154e6580b0c6): <https://commits.webkit.org/279068@main> Reviewed commits have been landed. Closing PR #28857 and removing active labels.