Revert r9359 "Implement NetEq's CurrentDelay function"

This reverts commit d8a03facf6986a011c8f889c63d87f9216a1e912, since it
broke the Chrome build. Will have to swap to using base/logging.h in
neteq_impl.cc before re-landing this change.

TBR=kwiberg@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/50219004

Cr-Commit-Position: refs/heads/master@{#9360}
5 files changed