As they are on the global and can be overridden it should be fine compatibility-wise and might even lead to a tiny performance improvement on legacy pages that try to set these. They are already gone in Chromium and Gecko. An interesting follow-up would be investigating how much of setStatusbarText and setStatusText can be removed.
<rdar://problem/114937585>
Pull request: https://github.com/WebKit/WebKit/pull/17413
Committed 267633@main (753b053ea7e2): <https://commits.webkit.org/267633@main> Reviewed commits have been landed. Closing PR #17413 and removing active labels.