Delete the audio modem and copresence private APIs.

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index dc5a3bb6327f42ed574f2956cd007f48a7dd00e2..1e608bbd442a6c3754c1965ee83f5fc53076a3da 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -1384,14 +1384,6 @@ test("browser_tests") {
     if (is_android || is_ios || is_chromeos) {
       sources -= [ "../browser/profiles/profile_statistics_browsertest.cc" ]
     }
-    if (!is_android && !is_ios) {
-      sources +=
-          [ "../browser/copresence/chrome_whispernet_client_browsertest.cc" ]
-      deps += [
-        "//components/audio_modem",
-        "//third_party/libaddressinput",
-      ]
-    }
     if (enable_app_list) {
       sources += rebase_path(
               chrome_tests_gypi_values.chrome_browser_tests_app_list_sources,
@@ -1941,7 +1933,6 @@ test("unit_tests") {
             "//chrome")
     deps += [
       "//chrome/common/extensions/api",
-      "//components/audio_modem:test_support",
       "//extensions:extensions_resources",
       "//extensions/strings",
     ]