Revert "Add plumbing of RtpPacketInfos to each AudioFrame as input for SourceTracker."

This reverts commit 3e8ef940fe86cf6285afb80e68d2a0bedc631b9f.

Reason for revert: This CL causes a performance regression in NetEq, see https://bugs.chromium.org/p/chromium/issues/detail?id=982260.

Original change's description:
> Add plumbing of RtpPacketInfos to each AudioFrame as input for SourceTracker.
>
> This change adds the plumbing of RtpPacketInfo from ChannelReceive::OnRtpPacket() to ChannelReceive::GetAudioFrameWithInfo() for audio. It is a step towards replacing the non-spec compliant ContributingSources that updates itself at packet-receive time, with the spec-compliant SourceTracker that will update itself at frame-delivery-to-track time.
>
> Bug: webrtc:10668
> Change-Id: I03385d6865bbc7bfbef7634f88de820a934f787a
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/139890
> Reviewed-by: Stefan Holmer <stefan@webrtc.org>
> Reviewed-by: Minyue Li <minyue@webrtc.org>
> Commit-Queue: Chen Xing <chxg@google.com>
> Cr-Commit-Position: refs/heads/master@{#28434}

TBR=kwiberg@webrtc.org,stefan@webrtc.org,minyue@webrtc.org,chxg@google.com

Bug: webrtc:10668, chromium:982260
Change-Id: I5e2cfde78c59d1123e21869564d76ed3f6193a5c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/145339
Reviewed-by: Ivo Creusen <ivoc@webrtc.org>
Commit-Queue: Ivo Creusen <ivoc@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#28561}

modules/audio_coding/neteq/packet.h

@@ -17,7 +17,6 @@
 #include <memory>
 
 #include "api/audio_codecs/audio_decoder.h"
-#include "api/rtp_packet_info.h"
 #include "modules/audio_coding/neteq/tick_timer.h"
 #include "rtc_base/buffer.h"
 #include "rtc_base/checks.h"
@@ -74,7 +73,6 @@ struct Packet {
   // Datagram excluding RTP header and header extension.
   rtc::Buffer payload;
   Priority priority;
-  RtpPacketInfo packet_info;
   std::unique_ptr<TickTimer::Stopwatch> waiting_time;
   std::unique_ptr<AudioDecoder::EncodedAudioFrame> frame;