Remove voe::OutputMixer and AudioConferenceMixer.

modules/audio_conference_mixer/source/time_scheduler.h

-/*
- *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-// The TimeScheduler class keeps track of periodic events. It is non-drifting
-// and keeps track of any missed periods so that it is possible to catch up.
-// (compare to a metronome)
-#include "rtc_base/criticalsection.h"
-
-#ifndef MODULES_AUDIO_CONFERENCE_MIXER_SOURCE_TIME_SCHEDULER_H_
-#define MODULES_AUDIO_CONFERENCE_MIXER_SOURCE_TIME_SCHEDULER_H_
-
-namespace webrtc {
-
-class TimeScheduler {
-public:
-    TimeScheduler(const int64_t periodicityInMs);
-    ~TimeScheduler() = default;
-
-    // Signal that a periodic event has been triggered.
-    int32_t UpdateScheduler();
-
-    // Set updateTimeInMs to the amount of time until UpdateScheduler() should
-    // be called. This time will never be negative.
-    int32_t TimeToNextUpdate(int64_t& updateTimeInMS) const;
-
-private:
-    rtc::CriticalSection _crit;
-
-    bool _isStarted;
-    int64_t _lastPeriodMark; // In ns
-
-    int64_t _periodicityInMs;
-    int64_t _periodicityInTicks;
-    uint32_t _missedPeriods;
-};
-}  // namespace webrtc
-
-#endif // MODULES_AUDIO_CONFERENCE_MIXER_SOURCE_TIME_SCHEDULER_H_