voice_engine: Removed old variants of Channel constructor and CreateChannel

webrtc/voice_engine/channel_manager.cc

Index: webrtc/voice_engine/channel_manager.cc
diff --git a/webrtc/voice_engine/channel_manager.cc b/webrtc/voice_engine/channel_manager.cc
index 5f20b2ed162b2bd30752c86b2de04c56d3ab2d96..bcc22b05f45a090a4605667ce01a6e007cdcff00 100644
--- a/webrtc/voice_engine/channel_manager.cc
+++ b/webrtc/voice_engine/channel_manager.cc
@@ -11,7 +11,6 @@
 #include "webrtc/voice_engine/channel_manager.h"
 
 #include "webrtc/common.h"
-#include "webrtc/modules/audio_coding/codecs/builtin_audio_decoder_factory.h"
 #include "webrtc/voice_engine/channel.h"
 
 namespace webrtc {
@@ -49,14 +48,6 @@ ChannelOwner::ChannelRef::ChannelRef(class Channel* channel)
 ChannelManager::ChannelManager(uint32_t instance_id, const Config& config)
     : instance_id_(instance_id), last_channel_id_(-1), config_(config) {}
 
-ChannelOwner ChannelManager::CreateChannel() {
-  return CreateChannel(CreateBuiltinAudioDecoderFactory());
-}
-
-ChannelOwner ChannelManager::CreateChannel(const Config& external_config) {
-  return CreateChannel(external_config, CreateBuiltinAudioDecoderFactory());
-}
-
 ChannelOwner ChannelManager::CreateChannel(
     const rtc::scoped_refptr<AudioDecoderFactory>& decoder_factory) {
   return CreateChannelInternal(config_, decoder_factory);