Revert of Wire up send-side bandwidth estimation. (patchset #8 id:140001 of https://codereview.webrtc.org/1338203003/ )

Reason for revert:
Breaking some Android bots.
https://chromegw.corp.google.com/i/client.webrtc/builders/Android32%20Tests%20%28L%20Nexus5%29

Original issue's description:
> Wire up send-side bandwidth estimation.
>
> BUG=webrtc:4173
>
> Committed: https://crrev.com/ef165eefc79cf28bb67779afe303cc2365885547
> Cr-Commit-Position: refs/heads/master@{#10012}

TBR=stefan@webrtc.org, kjellander@webrtc.org
NOPRESUBMIT=false
NOTREECHECKS=false
NOTRY=false
BUG=webrtc:4173

Review URL: https://codereview.webrtc.org/1362923002 .

Cr-Commit-Position: refs/heads/master@{#10029}

webrtc/modules/rtp_rtcp/source/rtcp_receiver_help.h

@@ -20,9 +20,6 @@
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
-namespace rtcp {
-class TransportFeedback;
-}
 namespace RTCPHelp
 {
 
@@ -87,8 +84,6 @@ public:
     bool xr_dlrr_item;
     RTCPVoIPMetric*  VoIPMetric;
 
-    rtc::scoped_ptr<rtcp::TransportFeedback> transport_feedback_;
-
 private:
     RTC_DISALLOW_COPY_AND_ASSIGN(RTCPPacketInformation);
 };