Clean up in module_common_types.h by removing the unused struct RTPAudioHeader.

By removing it we can in turn (next CL) get rid of RTPTypeHeader, which is a
union that cause some problems.

Bug: none
Change-Id: I9246ecbfe2c8b7eda27497cccbc5f438958b64bf
Reviewed-on: https://webrtc-review.googlesource.com/83985
Reviewed-by: Stefan Holmer <stefan@webrtc.org>
Reviewed-by: Henrik Lundin <henrik.lundin@webrtc.org>
Commit-Queue: Philip Eliasson <philipel@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23666}
diff --git a/modules/audio_coding/test/TestAllCodecs.cc b/modules/audio_coding/test/TestAllCodecs.cc
index df9c731..74de1d9 100644
--- a/modules/audio_coding/test/TestAllCodecs.cc
+++ b/modules/audio_coding/test/TestAllCodecs.cc
@@ -69,18 +69,13 @@
   rtp_info.header.sequenceNumber = sequence_number_++;
   rtp_info.header.payloadType = payload_type;
   rtp_info.header.timestamp = timestamp;
-  if (frame_type == kAudioFrameCN) {
-    rtp_info.type.Audio.isCNG = true;
-  } else {
-    rtp_info.type.Audio.isCNG = false;
-  }
+
   if (frame_type == kEmptyFrame) {
     // Skip this frame.
     return 0;
   }
 
   // Only run mono for all test cases.
-  rtp_info.type.Audio.channel = 1;
   memcpy(payload_data_, payload_data, payload_size);
 
   status = receiver_acm_->IncomingPacket(payload_data_, payload_size, rtp_info);