Revert(265057@main): Stop parsing word-boundary-detection
<rdar://problem/111506541>
Pull request: https://github.com/WebKit/WebKit/pull/15401
Committed 265664@main (606e9d4b0da4): <https://commits.webkit.org/265664@main> Reviewed commits have been landed. Closing PR #15401 and removing active labels.