The values returned by `TransientSuppressor::Initialize()` and by `TransientSuppressor::Suppress()` are never used. Bug: webrtc:13663 Change-Id: I20b8afb5a66f49e5ebaf132acf8bcd1c4292a5f8 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/255822 Reviewed-by: Jesus de Vicente Pena <devicentepena@webrtc.org> Commit-Queue: Alessio Bazzica <alessiob@webrtc.org> Cr-Commit-Position: refs/heads/main@{#36492}