Delete unused code from QuicSentPacketManager. No behavior change.

net/quic/core/quic_sent_packet_manager.cc

Index: net/quic/core/quic_sent_packet_manager.cc
diff --git a/net/quic/core/quic_sent_packet_manager.cc b/net/quic/core/quic_sent_packet_manager.cc
index 43ac40042920011cf6258b872020dcfb60446a48..ce4ca59e516e9f3898f064e2b79f28115c8c33e3 100644
--- a/net/quic/core/quic_sent_packet_manager.cc
+++ b/net/quic/core/quic_sent_packet_manager.cc
@@ -73,7 +73,6 @@ QuicSentPacketManager::QuicSentPacketManager(
       loss_algorithm_(&general_loss_algorithm_),
       general_loss_algorithm_(loss_type),
       n_connection_simulation_(false),
-      receive_buffer_bytes_(kDefaultSocketReceiveBuffer),
       least_packet_awaited_by_peer_(1),
       first_rto_transmission_(0),
       consecutive_rto_count_(0),
@@ -498,29 +497,6 @@ QuicPacketNumber QuicSentPacketManager::GetNewestRetransmission(
   return packet_number;
 }
 
-void QuicSentPacketManager::MarkPacketNotRetransmittable(
-    QuicPacketNumber packet_number,
-    QuicTime::Delta ack_delay_time) {
-  if (!unacked_packets_.IsUnacked(packet_number)) {
-    return;
-  }
-
-  const QuicTransmissionInfo& transmission_info =
-      unacked_packets_.GetTransmissionInfo(packet_number);
-  QuicPacketNumber newest_transmission =
-      GetNewestRetransmission(packet_number, transmission_info);
-  // We do not need to retransmit this packet anymore.
-  if (delegate_ != nullptr) {
-    delegate_->OnPacketMarkedNotRetransmittable(path_id_, newest_transmission,
-                                                ack_delay_time);
-  } else {
-    pending_retransmissions_.erase(newest_transmission);
-  }
-
-  unacked_packets_.NotifyAndClearListeners(newest_transmission, ack_delay_time);
-  unacked_packets_.RemoveRetransmittability(packet_number);
-}
-
 void QuicSentPacketManager::MarkPacketHandled(QuicPacketNumber packet_number,
                                               QuicTransmissionInfo* info,
                                               QuicTime::Delta ack_delay_time) {
@@ -1046,15 +1022,6 @@ size_t QuicSentPacketManager::GetConsecutiveTlpCount() const {
   return consecutive_tlp_count_;
 }
 
-QuicTransmissionInfo* QuicSentPacketManager::GetMutableTransmissionInfo(
-    QuicPacketNumber packet_number) {
-  return unacked_packets_.GetMutableTransmissionInfo(packet_number);
-}
-
-void QuicSentPacketManager::RemoveObsoletePackets() {
-  unacked_packets_.RemoveObsoletePackets();
-}
-
 void QuicSentPacketManager::OnApplicationLimited() {
   send_algorithm_->OnApplicationLimited(unacked_packets_.bytes_in_flight());
 }