Fix QUIC warnings in preparation for enabling them

gfe-relnote: n/a, compilation-only change
PiperOrigin-RevId: 253893322
Change-Id: I15917a1c5b325922850086277cfad5e3b4da20a4
diff --git a/quic/core/congestion_control/bbr_sender.cc b/quic/core/congestion_control/bbr_sender.cc
index 858e57d..ef06cbf 100644
--- a/quic/core/congestion_control/bbr_sender.cc
+++ b/quic/core/congestion_control/bbr_sender.cc
@@ -187,7 +187,7 @@
   return bytes_in_flight < GetCongestionWindow();
 }
 
-QuicBandwidth BbrSender::PacingRate(QuicByteCount bytes_in_flight) const {
+QuicBandwidth BbrSender::PacingRate(QuicByteCount /*bytes_in_flight*/) const {
   if (pacing_rate_.IsZero()) {
     return high_gain_ * QuicBandwidth::FromBytesAndTimeDelta(
                             initial_congestion_window_, GetMinRtt());