[ACM] iSAC audio codec removed

Note: this CL has to leave behind one part of iSAC, which is its VAD
currently used by AGC1 in APM. The target visibility has been
restricted and the VAD will be removed together with AGC1 when the
time comes.

Tested: see https://chromium-review.googlesource.com/c/chromium/src/+/4013319

Bug: webrtc:14450
Change-Id: I69cc518b16280eae62a1f1977cdbfa24c08cf5f9
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/282421
Reviewed-by: Henrik Lundin <henrik.lundin@webrtc.org>
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Commit-Queue: Alessio Bazzica <alessiob@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38652}
diff --git a/modules/audio_coding/test/EncodeDecodeTest.cc b/modules/audio_coding/test/EncodeDecodeTest.cc
index 8d4bcce..9f9c4aa 100644
--- a/modules/audio_coding/test/EncodeDecodeTest.cc
+++ b/modules/audio_coding/test/EncodeDecodeTest.cc
@@ -110,9 +110,7 @@
   EXPECT_EQ(0, acm->InitializeReceiver());
 
   if (channels == 1) {
-    acm->SetReceiveCodecs({{103, {"ISAC", 16000, 1}},
-                           {104, {"ISAC", 32000, 1}},
-                           {107, {"L16", 8000, 1}},
+    acm->SetReceiveCodecs({{107, {"L16", 8000, 1}},
                            {108, {"L16", 16000, 1}},
                            {109, {"L16", 32000, 1}},
                            {0, {"PCMU", 8000, 1}},
@@ -232,7 +230,6 @@
 
 void EncodeDecodeTest::Perform() {
   const std::map<int, SdpAudioFormat> send_codecs = {
-      {103, {"ISAC", 16000, 1}}, {104, {"ISAC", 32000, 1}},
       {107, {"L16", 8000, 1}},   {108, {"L16", 16000, 1}},
       {109, {"L16", 32000, 1}},  {0, {"PCMU", 8000, 1}},
       {8, {"PCMA", 8000, 1}},