178009@main (r203319, bug#159842) marked editing/deleting/delete-emoji.html Slow. But, no ports doesn't seem to be slow these days. https://results.webkit.org/?suite=layout-tests&test=editing%2Fdeleting%2Fdelete-emoji.html
Pull request: https://github.com/WebKit/WebKit/pull/19270
<rdar://problem/117514757>