Remove the preprocessor symbol WEBRTC_CODEC_PCM16 (it was always defined)

webrtc/modules/audio_coding/main/test/TestRedFec.cc

 /*
  *  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.
  */
 
@@ skipping 64 matching lines @@
       myCodecParam.channels = 1;
     }
     EXPECT_EQ(0, _acmB->RegisterReceiveCodec(myCodecParam));
   }
 
   // Create and connect the channel
   _channelA2B = new Channel;
   _acmA->RegisterTransportCallback(_channelA2B);
   _channelA2B->RegisterReceiverACM(_acmB.get());
 
-#ifndef WEBRTC_CODEC_PCM16
-  EXPECT_TRUE(false) << "PCM16 needs to be activated to run this test\n");
-  return;
-#endif
   EXPECT_EQ(0, RegisterSendCodec('A', kNameL16, 8000));
   EXPECT_EQ(0, RegisterSendCodec('A', kNameCN, 8000));
   EXPECT_EQ(0, RegisterSendCodec('A', kNameRED));
   EXPECT_EQ(0, SetVAD(true, true, VADAggr));
   EXPECT_EQ(0, _acmA->SetREDStatus(true));
   EXPECT_TRUE(_acmA->REDStatus());
 
   OpenOutFile(_testCntr);
   Run();
   _outFileB.Close();
@@ skipping 366 matching lines @@
   std::string file_name;
   std::stringstream file_stream;
   file_stream << webrtc::test::OutputPath();
   file_stream << "TestRedFec_outFile_";
   file_stream << test_number << ".pcm";
   file_name = file_stream.str();
   _outFileB.Open(file_name, 16000, "wb");
 }
 
 }  // namespace webrtc