void decodeAudioData(Ref<JSC::ArrayBuffer>&&, RefPtr<AudioBufferCallback>&&, RefPtr<AudioBufferCallback>&&); is unused. And so Ref<DeferredPromise>&& in the other method doesn't need to be an optional.
<rdar://problem/117283688>
Pull request: https://github.com/WebKit/WebKit/pull/19377
Committed 269616@main (e854e7882cca): <https://commits.webkit.org/269616@main> Reviewed commits have been landed. Closing PR #19377 and removing active labels.