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

webrtc/common_audio/sparse_fir_filter.cc

Index: webrtc/common_audio/sparse_fir_filter.cc
diff --git a/webrtc/common_audio/sparse_fir_filter.cc b/webrtc/common_audio/sparse_fir_filter.cc
index a79da07b2d976781c24bd01719865d3ee9a7c30f..2928004a0df89fa14ae7384b49dd5ef2f90ed645 100644
--- a/webrtc/common_audio/sparse_fir_filter.cc
+++ b/webrtc/common_audio/sparse_fir_filter.cc
@@ -22,8 +22,8 @@ SparseFIRFilter::SparseFIRFilter(const float* nonzero_coeffs,
       offset_(offset),
       nonzero_coeffs_(nonzero_coeffs, nonzero_coeffs + num_nonzero_coeffs),
       state_(sparsity_ * (num_nonzero_coeffs - 1) + offset_, 0.f) {
-  RTC_CHECK_GE(num_nonzero_coeffs, 1u);
-  RTC_CHECK_GE(sparsity, 1u);
+  RTC_CHECK_GE(num_nonzero_coeffs, 1);
+  RTC_CHECK_GE(sparsity, 1);
 }
 
 SparseFIRFilter::~SparseFIRFilter() = default;