Remove spammy logging of RTCP delivery failures.

Since BundleFilter doesn't filter RTCP anymore we can have incoming
RTCPs for audio delivered to video, that delivery will fail when there
are no video receivers causing the log to be spammed.

BUG=webrtc:5223
R=henrika@webrtc.org

Review URL: https://codereview.webrtc.org/1458853002 .

Cr-Commit-Position: refs/heads/master@{#10687}
diff --git a/talk/media/webrtc/webrtcvideoengine2.cc b/talk/media/webrtc/webrtcvideoengine2.cc
index 101ed15..0f1587d 100644
--- a/talk/media/webrtc/webrtcvideoengine2.cc
+++ b/talk/media/webrtc/webrtcvideoengine2.cc
@@ -1478,12 +1478,14 @@
     const rtc::PacketTime& packet_time) {
   const webrtc::PacketTime webrtc_packet_time(packet_time.timestamp,
                                               packet_time.not_before);
-  if (call_->Receiver()->DeliverPacket(
-          webrtc::MediaType::VIDEO,
-          reinterpret_cast<const uint8_t*>(packet->data()), packet->size(),
-          webrtc_packet_time) != webrtc::PacketReceiver::DELIVERY_OK) {
-    LOG(LS_WARNING) << "Failed to deliver RTCP packet.";
-  }
+  // TODO(pbos): Check webrtc::PacketReceiver::DELIVERY_OK once we deliver
+  // for both audio and video on the same path. Since BundleFilter doesn't
+  // filter RTCP anymore incoming RTCP packets could've been going to audio (so
+  // logging failures spam the log).
+  call_->Receiver()->DeliverPacket(
+      webrtc::MediaType::VIDEO,
+      reinterpret_cast<const uint8_t*>(packet->data()), packet->size(),
+      webrtc_packet_time);
 }
 
 void WebRtcVideoChannel2::OnReadyToSend(bool ready) {