Remove unnecessary methods from QuicUnackedPacketMap and a minor

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 479711b912dbb874aa9e8f8f59e153c83e62c12e..7f7261596b3d3aeba28ae0e74e97051b6d22346c 100644
--- a/net/quic/test_tools/quic_sent_packet_manager_peer.cc
+++ b/net/quic/test_tools/quic_sent_packet_manager_peer.cc
@@ -113,12 +113,6 @@ size_t QuicSentPacketManagerPeer::GetNumRetransmittablePackets(
 }
 
 // static
-SequenceNumberSet QuicSentPacketManagerPeer::GetUnackedPackets(
-    const QuicSentPacketManager* sent_packet_manager) {
-  return sent_packet_manager->unacked_packets_.GetUnackedPackets();
-}
-
-// static
 QuicByteCount QuicSentPacketManagerPeer::GetBytesInFlight(
     const QuicSentPacketManager* sent_packet_manager) {
   return sent_packet_manager->unacked_packets_.bytes_in_flight();