Delete media transport integration.

MediaTransport is deprecated and the code is unused.

No-Try: True
Bug: webrtc:9719
Change-Id: I5b864c1e74bf04df16c15f51b8fac3d407331dcd
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/160620
Commit-Queue: Bjorn Mellem <mellem@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org>
Reviewed-by: Åsa Persson <asapersson@webrtc.org>
Reviewed-by: Steve Anton <steveanton@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29923}
diff --git a/test/call_test.cc b/test/call_test.cc
index 9f26cc6..10b631a 100644
--- a/test/call_test.cc
+++ b/test/call_test.cc
@@ -36,7 +36,7 @@
       task_queue_factory_(CreateDefaultTaskQueueFactory()),
       send_event_log_(std::make_unique<RtcEventLogNull>()),
       recv_event_log_(std::make_unique<RtcEventLogNull>()),
-      audio_send_config_(/*send_transport=*/nullptr, MediaTransportConfig()),
+      audio_send_config_(/*send_transport=*/nullptr),
       audio_send_stream_(nullptr),
       frame_generator_capturer_(nullptr),
       fake_encoder_factory_([this]() {
@@ -275,8 +275,7 @@
   RTC_DCHECK_LE(num_audio_streams, 1);
   RTC_DCHECK_LE(num_flexfec_streams, 1);
   if (num_audio_streams > 0) {
-    AudioSendStream::Config audio_send_config(send_transport,
-                                              MediaTransportConfig());
+    AudioSendStream::Config audio_send_config(send_transport);
     audio_send_config.rtp.ssrc = kAudioSendSsrc;
     audio_send_config.send_codec_spec = AudioSendStream::Config::SendCodecSpec(
         kAudioSendPayloadType, {"opus", 48000, 2, {{"stereo", "1"}}});