LayoutTests/fast/multicol/client-rects.html and LayoutTests/fast/multicol/newmulticol/client-rects.html are almost identical (with the other one having `<head>` around `<style>`). Let's remove the latter.
<rdar://problem/102640350>
Pull request: https://github.com/WebKit/WebKit/pull/6779
Committed 256986@main (f32c8a00fe0c): <https://commits.webkit.org/256986@main> Reviewed commits have been landed. Closing PR #6779 and removing active labels.