Remove voe::Channel::StopReceive() and associated logic.

webrtc/voice_engine/test/auto_test/standard/dtmf_test.cc

Index: webrtc/voice_engine/test/auto_test/standard/dtmf_test.cc
diff --git a/webrtc/voice_engine/test/auto_test/standard/dtmf_test.cc b/webrtc/voice_engine/test/auto_test/standard/dtmf_test.cc
index 0d0377bb2fc664774a648fa75b2f376dcf0b0c0b..896da037e3692c275f84def9175af493522f58ce 100644
--- a/webrtc/voice_engine/test/auto_test/standard/dtmf_test.cc
+++ b/webrtc/voice_engine/test/auto_test/standard/dtmf_test.cc
@@ -48,9 +48,7 @@ TEST_F(DtmfTest, ManualCanChangeDtmfPayloadType) {
       codec_instance.pltype = 88;  // Use 88 instead of default 106.
       EXPECT_EQ(0, voe_base_->StopSend(channel_));
       EXPECT_EQ(0, voe_base_->StopPlayout(channel_));
-      EXPECT_EQ(0, voe_base_->StopReceive(channel_));
       EXPECT_EQ(0, voe_codec_->SetRecPayloadType(channel_, codec_instance));
-      EXPECT_EQ(0, voe_base_->StartReceive(channel_));
       EXPECT_EQ(0, voe_base_->StartPlayout(channel_));
       EXPECT_EQ(0, voe_base_->StartSend(channel_));
       break;