Audio Player WebUI: remove time update feedback

Bug: 921118
Change-Id: I3d75a4542d86168c9c920681fc889478872774f6
Reviewed-on: https://chromium-review.googlesource.com/c/1407496
Reviewed-by: Joel Hockey <joelhockey@chromium.org>
Commit-Queue: Esmael El-Moslimany <aee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#622184}
3 files changed