Remove timestamp_receiver. Not used.

net/quic/congestion_control/timestamp_receiver.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef NET_QUIC_CONGESTION_CONTROL_TIMESTAMP_RECEIVER_H_
-#define NET_QUIC_CONGESTION_CONTROL_TIMESTAMP_RECEIVER_H_
-
-#include "base/basictypes.h"
-#include "net/quic/congestion_control/receive_algorithm_interface.h"
-#include "net/quic/quic_clock.h"
-#include "net/quic/quic_protocol.h"
-
-namespace net {
-
-class NET_EXPORT_PRIVATE TimestampReceiver : public ReceiveAlgorithmInterface {
- public:
-  TimestampReceiver();
-  virtual ~TimestampReceiver();
-
-  virtual bool GenerateCongestionFeedback(
-      QuicCongestionFeedbackFrame* feedback) OVERRIDE;
-
-  virtual void RecordIncomingPacket(QuicByteCount bytes,
-                                    QuicPacketSequenceNumber sequence_number,
-                                    QuicTime timestamp) OVERRIDE;
-
- private:
-  // The set of received packets since the last feedback was sent, along with
-  // their arrival times.
-  TimeMap received_packet_times_;
-
-  DISALLOW_COPY_AND_ASSIGN(TimestampReceiver);
-};
-
-}  // namespace net
-
-#endif  // NET_QUIC_CONGESTION_CONTROL_TIMESTAMP_RECEIVER_H_