Remove unused agc_unittest.cc and agc_harness.cc

webrtc/tools/agc/test_utils.h

-/*
- *  Copyright (c) 2012 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.
- */
-
-#ifndef WEBRTC_TOOLS_AGC_TEST_UTILS_H_
-#define WEBRTC_TOOLS_AGC_TEST_UTILS_H_
-namespace webrtc {
-
-class AudioFrame;
-
-float MicLevel2Gain(int gain_range_db, int level);
-float Db2Linear(float db);
-void ApplyGainLinear(float gain, float last_gain, AudioFrame* frame);
-void ApplyGain(float gain_db, float last_gain_db, AudioFrame* frame);
-void SimulateMic(int gain_range_db, int mic_level, int last_mic_level,
-                 AudioFrame* frame);
-void SimulateMic(int gain_map[255], int mic_level, int last_mic_level,
-                 AudioFrame* frame);
-
-}  // namespace webrtc
-
-#endif  // WEBRTC_TOOLS_AGC_TEST_UTILS_H_