fast/events/remove-iframe-during-toggle-crash.html is crashing since 254699@main.
<rdar://100558596>
Pull request: https://github.com/WebKit/WebKit/pull/6365
Committed 256552@main (9c08d49c54bf): <https://commits.webkit.org/256552@main> Reviewed commits have been landed. Closing PR #6365 and removing active labels.