Delete the audio modem and copresence private APIs.

components/audio_modem/BUILD.gn

Index: components/audio_modem/BUILD.gn
diff --git a/components/audio_modem/BUILD.gn b/components/audio_modem/BUILD.gn
deleted file mode 100644
index 83cd882d109fbd178b84bb1922a7ef955e5f3d92..0000000000000000000000000000000000000000
--- a/components/audio_modem/BUILD.gn
+++ /dev/null
@@ -1,72 +0,0 @@
-# Copyright 2015 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-source_set("audio_modem") {
-  sources = [
-    "audio_modem_switches.cc",
-    "audio_modem_switches.h",
-    "audio_player.h",
-    "audio_player_impl.cc",
-    "audio_player_impl.h",
-    "audio_recorder.h",
-    "audio_recorder_impl.cc",
-    "audio_recorder_impl.h",
-    "constants.cc",
-    "modem_impl.cc",
-    "modem_impl.h",
-    "public/audio_modem_types.h",
-    "public/modem.h",
-    "public/whispernet_client.h",
-  ]
-
-  deps = [
-    "//base",
-    "//content/public/browser",
-    "//media",
-    "//media:shared_memory_support",
-    "//third_party/webrtc/common_audio",
-  ]
-}
-
-source_set("test_support") {
-  testonly = true
-  sources = [
-    "test/random_samples.cc",
-    "test/random_samples.h",
-    "test/stub_modem.cc",
-    "test/stub_modem.h",
-    "test/stub_whispernet_client.cc",
-    "test/stub_whispernet_client.h",
-  ]
-
-  public_deps = [
-    ":audio_modem",
-  ]
-  deps = [
-    "//base",
-    "//media",
-    "//media:shared_memory_support",
-  ]
-}
-
-source_set("unit_tests") {
-  testonly = true
-  sources = [
-    "audio_player_unittest.cc",
-    "audio_recorder_unittest.cc",
-    "modem_unittest.cc",
-  ]
-
-  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
-
-  deps = [
-    ":test_support",
-    "//base",
-    "//base/test:test_support",
-    "//content/test:test_support",
-    "//media",
-    "//media:shared_memory_support",
-    "//testing/gtest",
-  ]
-}