createBusFromAudioFile and writeBusToAudioFile aren't used. let's remove them.
<rdar://problem/79551933>
Created attachment 431840 [details] Patch
Depends on bug 227205 to compile.
Created attachment 431944 [details] Patch rebase
Committed r279123 (239039@main): <https://commits.webkit.org/239039@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 431944 [details].