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

webrtc/modules/audio_processing/transient/moving_moments.cc

Index: webrtc/modules/audio_processing/transient/moving_moments.cc
diff --git a/webrtc/modules/audio_processing/transient/moving_moments.cc b/webrtc/modules/audio_processing/transient/moving_moments.cc
index bc0b6f0b9193a7f09cb73d1e343ed0a6b8d3b782..8bca505aef53c17cd0d966c86b2e0574f4257e55 100644
--- a/webrtc/modules/audio_processing/transient/moving_moments.cc
+++ b/webrtc/modules/audio_processing/transient/moving_moments.cc
@@ -22,7 +22,7 @@ MovingMoments::MovingMoments(size_t length)
       queue_(),
       sum_(0.0),
       sum_of_squares_(0.0) {
-  RTC_DCHECK_GT(length, 0u);
+  RTC_DCHECK_GT(length, 0);
   for (size_t i = 0; i < length; ++i) {
     queue_.push(0.0);
   }