RTC_[D]CHECK_op: Remove "u" suffix on integer constants

webrtc/modules/audio_device/ios/audio_device_ios.mm

Index: webrtc/modules/audio_device/ios/audio_device_ios.mm
diff --git a/webrtc/modules/audio_device/ios/audio_device_ios.mm b/webrtc/modules/audio_device/ios/audio_device_ios.mm
index ed8dbad78433cfa67c77259c2942209971b92c32..bf6cac7d3cc088d236584513db0de92f46cc6927 100644
--- a/webrtc/modules/audio_device/ios/audio_device_ios.mm
+++ b/webrtc/modules/audio_device/ios/audio_device_ios.mm
@@ -407,9 +407,9 @@ OSStatus AudioDeviceIOS::OnGetPlayoutData(AudioUnitRenderActionFlags* flags,
                                           UInt32 num_frames,
                                           AudioBufferList* io_data) {
   // Verify 16-bit, noninterleaved mono PCM signal format.
-  RTC_DCHECK_EQ(1u, io_data->mNumberBuffers);
+  RTC_DCHECK_EQ(1, io_data->mNumberBuffers);
   AudioBuffer* audio_buffer = &io_data->mBuffers[0];
-  RTC_DCHECK_EQ(1u, audio_buffer->mNumberChannels);
+  RTC_DCHECK_EQ(1, audio_buffer->mNumberChannels);
   // Get pointer to internal audio buffer to which new audio data shall be
   // written.
   const size_t size_in_bytes = audio_buffer->mDataByteSize;