Revert of Log audio network adapter decisions in event log. (patchset #14 id:320001 of https://codereview.webrtc.org/2559953002/ )

Reason for revert:
Breaks chromium.webrtc.fyi.

Original issue's description:
> Log audio network adapter decisions in event log.
>
> BUG=webrtc:6845
>
> Review-Url: https://codereview.webrtc.org/2559953002
> Cr-Commit-Position: refs/heads/master@{#16053}
> Committed: https://chromium.googlesource.com/external/webrtc/+/3663681b5d05682f38e75d9eaf6049299f62fb02

TBR=minyue@webrtc.org,henrik.lundin@webrtc.org,terelius@webrtc.org,stefan@webrtc.org,solenberg@webrtc.org,michaelt@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6845

Review-Url: https://codereview.webrtc.org/2631703002
Cr-Original-Commit-Position: refs/heads/master@{#16054}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 363a29157ad162f48c63e9d6424ff9949af59e4a
22 files changed