Remove audio_resampler and audio_resampler_kernel

These are unused, so removing them to avoid confusion.

Change-Id: I297633f23649fd52bf40182004c0eb9fec50cb52
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4348938


Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Hongchan Choi <hongchan@chromium.org>
Commit-Queue: Michael Wilson <mjwilson@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1118890}