Remove GetRttStats from QuicSentPacketManagerPeer.

net/quic/test_tools/quic_sent_packet_manager_peer.cc

Index: net/quic/test_tools/quic_sent_packet_manager_peer.cc
diff --git a/net/quic/test_tools/quic_sent_packet_manager_peer.cc b/net/quic/test_tools/quic_sent_packet_manager_peer.cc
index e3bb4790f079558785a9102da27f1290d3d8a112..ed5e554b6000874f87b626c5f41aabb035f3f5ae 100644
--- a/net/quic/test_tools/quic_sent_packet_manager_peer.cc
+++ b/net/quic/test_tools/quic_sent_packet_manager_peer.cc
@@ -85,12 +85,6 @@ void QuicSentPacketManagerPeer::SetLossAlgorithm(
 }
 
 // static
-RttStats* QuicSentPacketManagerPeer::GetRttStats(
-    QuicSentPacketManager* sent_packet_manager) {
-  return &sent_packet_manager->rtt_stats_;
-}
-
-// static
 bool QuicSentPacketManagerPeer::HasPendingPackets(
     const QuicSentPacketManager* sent_packet_manager) {
   return sent_packet_manager->unacked_packets_.HasInFlightPackets();