Delete NetEqTest::ExtDecoderMap

Bug: webrtc:10080
Change-Id: Ica2c3b8b94bd31cd3af98b2e918dafc223c341ef
Reviewed-on: https://webrtc-review.googlesource.com/c/115417
Reviewed-by: Ivo Creusen <ivoc@webrtc.org>
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26164}
diff --git a/modules/audio_coding/neteq/neteq_unittest.cc b/modules/audio_coding/neteq/neteq_unittest.cc
index 5dd77e5..d45877a 100644
--- a/modules/audio_coding/neteq/neteq_unittest.cc
+++ b/modules/audio_coding/neteq/neteq_unittest.cc
@@ -1712,7 +1712,6 @@
   NetEq::Config config;
   config.for_test_no_time_stretching = true;
   auto codecs = NetEqTest::StandardDecoderMap();
-  NetEqTest::ExtDecoderMap ext_codecs;
   NetEqPacketSourceInput::RtpHeaderExtensionMap rtp_ext_map = {
       {1, kRtpExtensionAudioLevel},
       {3, kRtpExtensionAbsoluteSendTime},
@@ -1726,9 +1725,8 @@
       new TimeLimitedNetEqInput(std::move(input), 20000));
   std::unique_ptr<AudioSink> output(new VoidAudioSink);
   NetEqTest::Callbacks callbacks;
-  NetEqTest test(config, CreateBuiltinAudioDecoderFactory(), codecs, ext_codecs,
-                 nullptr, std::move(input_time_limit), std::move(output),
-                 callbacks);
+  NetEqTest test(config, CreateBuiltinAudioDecoderFactory(), codecs, nullptr,
+                 std::move(input_time_limit), std::move(output), callbacks);
   test.Run();
   const auto stats = test.SimulationStats();
   EXPECT_EQ(0, stats.accelerate_rate);