--- a/dom/media/platforms/wmf/WMFAudioMFTManager.cpp
+++ b/dom/media/platforms/wmf/WMFAudioMFTManager.cpp
@@ -209,21 +209,16 @@ WMFAudioMFTManager::UpdateOutputType()
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
 
   hr = type->GetUINT32(MF_MT_AUDIO_NUM_CHANNELS, &mAudioChannels);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
 
   hr = type->GetUINT32(MF_MT_AUDIO_CHANNEL_MASK, &mChannelsMap);
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
 
-  AudioConfig::ChannelLayout layout(mAudioChannels);
-  if (!layout.IsValid()) {
-    return E_FAIL;
-  }
-
   return S_OK;
 }
 
 HRESULT
 WMFAudioMFTManager::Output(int64_t aStreamOffset,
                            RefPtr<MediaData>& aOutData)
 {
   aOutData = nullptr;