We no longer need WebKitLegacy on Windows. Windows is now modern WebKit-only!
<rdar://problem/105510314>
Pull request: https://github.com/WebKit/WebKit/pull/10162
Committed 260397@main (252ee7ef89ec): <https://commits.webkit.org/260397@main> Reviewed commits have been landed. Closing PR #10162 and removing active labels.