Delete the audio modem and copresence private APIs.

components/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//tools/grit/repack.gni")
 
 if (is_android) {
@@ skipping 245 matching lines @@
     ]
 
     if (enable_configuration_policy) {
       deps += [ "//components/policy/android:policy_java" ]
     }
   }
 
   # Desktop-only deps.
   if (!is_android && !is_ios) {
     deps += [
-      "//components/audio_modem:unit_tests",
       "//components/feedback:unit_tests",
       "//components/proximity_auth:unit_tests",
       "//components/storage_monitor:unit_tests",
       "//components/web_modal:unit_tests",
       "//components/webusb:unit_tests",
     ]
   }
 
   if (enable_rlz_support) {
     deps += [ "//components/rlz:unit_tests" ]
@@ skipping 218 matching lines @@
       "//base/test:test_support_perf",
       "//components/scheduler",
       "//components/visitedlink/browser",
       "//content/test:test_support",
       "//testing/gtest",
       "//testing/perf",
       "//url",
     ]
   }
 }