modules/audio_coding: Remove some codec include dirs

webrtc/modules/audio_coding/codecs/pcm16b/include/pcm16b.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.
- */
-
-#ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_PCM16B_MAIN_INCLUDE_PCM16B_H_
-#define WEBRTC_MODULES_AUDIO_CODING_CODECS_PCM16B_MAIN_INCLUDE_PCM16B_H_
-/*
- * Define the fixpoint numeric formats
- */
-
-#include <stddef.h>
-
-#include "webrtc/typedefs.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/****************************************************************************
- * WebRtcPcm16b_Encode(...)
- *
- * "Encode" a sample vector to 16 bit linear (Encoded standard is big endian)
- *
- * Input:
- *              - speech        : Input speech vector
- *              - len           : Number of samples in speech vector
- *
- * Output:
- *              - encoded       : Encoded data vector (big endian 16 bit)
- *
- * Returned value               : Length (in bytes) of coded data.
- *                                Always equal to twice the len input parameter.
- */
-
-size_t WebRtcPcm16b_Encode(const int16_t* speech,
-                           size_t len,
-                           uint8_t* encoded);
-
-/****************************************************************************
- * WebRtcPcm16b_Decode(...)
- *
- * "Decode" a vector to 16 bit linear (Encoded standard is big endian)
- *
- * Input:
- *              - encoded       : Encoded data vector (big endian 16 bit)
- *              - len           : Number of bytes in encoded
- *
- * Output:
- *              - speech        : Decoded speech vector
- *
- * Returned value               : Samples in speech
- */
-
-size_t WebRtcPcm16b_Decode(const uint8_t* encoded,
-                           size_t len,
-                           int16_t* speech);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* PCM16B */