Now that voe::Channel is owned by Audio[Send|Receive]Stream, the legacy VoiceEngine and the VoEBase interface is unused. Also removes Atomic32, which was only used for ref counting VoiceEngine. Bug: webrtc:4690 Change-Id: I73b8a083df544a8ab6383d57075a65ce955c592a Reviewed-on: https://webrtc-review.googlesource.com/38723 Commit-Queue: Fredrik Solenberg <solenberg@webrtc.org> Reviewed-by: Henrik Andreassson <henrika@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21595}