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

webrtc/modules/audio_coding/neteq/nack_tracker.cc

Index: webrtc/modules/audio_coding/neteq/nack_tracker.cc
diff --git a/webrtc/modules/audio_coding/neteq/nack_tracker.cc b/webrtc/modules/audio_coding/neteq/nack_tracker.cc
index 62cb2ec958af6b355bfb76325c101451988d5bfd..f97879319adcf215fc4a57c045964c0b297fa99d 100644
--- a/webrtc/modules/audio_coding/neteq/nack_tracker.cc
+++ b/webrtc/modules/audio_coding/neteq/nack_tracker.cc
@@ -196,7 +196,7 @@ void NackTracker::Reset() {
 }
 
 void NackTracker::SetMaxNackListSize(size_t max_nack_list_size) {
-  RTC_CHECK_GT(max_nack_list_size, 0u);
+  RTC_CHECK_GT(max_nack_list_size, 0);
   // Ugly hack to get around the problem of passing static consts by reference.
   const size_t kNackListSizeLimitLocal = NackTracker::kNackListSizeLimit;
   RTC_CHECK_LE(max_nack_list_size, kNackListSizeLimitLocal);