message: Remove unused NTP time functions from RtpPacketReceived.
  Cr-Commit-Position: refs/heads/master@{#32876}
diff: #include "api/array_view.h"
  #include "api/rtp_headers.h"
  #include "modules/rtp_rtcp/source/rtp_packet.h"
  -#include "system_wrappers/include/ntp_time.h"
  namespace webrtc {
  // Class to hold rtp packet with metadata for receiver side.
  @@ -42,10 +41,6 @@ class RtpPacketReceived : public RtpPacket {
  int64_t arrival_time_ms() const { return arrival_time_ms_; }
  void set_arrival_time_ms(int64_t time) { arrival_time_ms_ = time; }
  - // Estimated from Timestamp() using rtcp Sender Reports.
  - NtpTime capture_ntp_time() const { return capture_time_; }
  - void set_capture_ntp_time(NtpTime time) { capture_time_ = time; }
  -
  // Flag if packet was recovered via RTX or FEC.
  bool recovered() const { return recovered_; }
  void set_recovered(bool value) { recovered_ = value; }
  @@ -65,7 +60,6 @@ class RtpPacketReceived : public RtpPacket {
  }
  private:
  - NtpTime capture_time_;
  int64_t arrival_time_ms_ = 0;
  int payload_type_frequency_ = 0;
  bool recovered_ = false;
  