The code path of ITM on and not using AX thread is no longer possible or desirable, so remove unused code.
<rdar://problem/109118496>
Created attachment 466299 [details] Patch
Created attachment 467213 [details] Patch
Committed 266660@main (3e01a642c916): <https://commits.webkit.org/266660@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 467213 [details].