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

webrtc/modules/audio_processing/residual_echo_detector.cc

Index: webrtc/modules/audio_processing/residual_echo_detector.cc
diff --git a/webrtc/modules/audio_processing/residual_echo_detector.cc b/webrtc/modules/audio_processing/residual_echo_detector.cc
index 0e58b497fed0e168cc73cfa30f92e945bb2c150c..45ef1809f03656bb57d672b66c2dd45b3efcba70 100644
--- a/webrtc/modules/audio_processing/residual_echo_detector.cc
+++ b/webrtc/modules/audio_processing/residual_echo_detector.cc
@@ -130,7 +130,7 @@ void ResidualEchoDetector::Initialize() {
 void ResidualEchoDetector::PackRenderAudioBuffer(
     AudioBuffer* audio,
     std::vector<float>* packed_buffer) {
-  RTC_DCHECK_GE(160u, audio->num_frames_per_band());
+  RTC_DCHECK_GE(160, audio->num_frames_per_band());
 
   packed_buffer->clear();
   packed_buffer->insert(packed_buffer->end(),