We no longer use compilers that can't =default move construction and assignment

webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng.cc

Index: webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng.cc
diff --git a/webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng.cc b/webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng.cc
index 3b48131a754e7f33ce8ded0d5cb259e584d7ae93..2f80944be2a1dacde2ef7e33bd67f0f8f43dd609 100644
--- a/webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng.cc
+++ b/webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng.cc
@@ -37,17 +37,7 @@ std::unique_ptr<CNG_enc_inst, CngInstDeleter> CreateCngInst(
 }  // namespace
 
 AudioEncoderCng::Config::Config() = default;
-
-// TODO(kwiberg): =default this when Visual Studio learns to handle it.
-AudioEncoderCng::Config::Config(Config&& c)
-    : num_channels(c.num_channels),
-      payload_type(c.payload_type),
-      speech_encoder(std::move(c.speech_encoder)),
-      vad_mode(c.vad_mode),
-      sid_frame_interval_ms(c.sid_frame_interval_ms),
-      num_cng_coefficients(c.num_cng_coefficients),
-      vad(c.vad) {}
-
+AudioEncoderCng::Config::Config(Config&&) = default;
 AudioEncoderCng::Config::~Config() = default;
 
 bool AudioEncoderCng::Config::IsOk() const {