Revert of Creating webrtc/modules:module_api

webrtc/modules/audio_mixer/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("../../webrtc.gni")
 
@@ skipping 20 matching lines @@
     "default_output_rate_calculator.h",  # For creating a mixer with limiter disabled.
     "frame_combiner.h",
   ]
 
   public_deps = [
     "../../api:audio_mixer_api",
   ]
 
   deps = [
     ":audio_frame_manipulator",
-    "..:module_api",
     "../..:webrtc_common",
     "../../audio/utility:audio_frame_operations",
     "../../base:rtc_base_approved",
     "../../system_wrappers",
     "../audio_processing",
   ]
 }
 
 rtc_static_library("audio_frame_manipulator") {
   visibility = [
     ":*",
     "../../modules:*",
   ]
 
   sources = [
     "audio_frame_manipulator.cc",
     "audio_frame_manipulator.h",
   ]
 
   deps = [
-    "..:module_api",
     "../../audio/utility",
     "../../base:rtc_base_approved",
   ]
 }
 
 if (rtc_include_tests) {
   rtc_source_set("audio_mixer_unittests") {
     testonly = true
 
     # Skip restricting visibility on mobile platforms since the tests on those
     # gets additional generated targets which would require many lines here to
     # cover (which would be confusing to read and hard to maintain).
     if (!is_android && !is_ios) {
       visibility = [ "//webrtc/modules:modules_unittests" ]
     }
     sources = [
       "audio_frame_manipulator_unittest.cc",
       "audio_mixer_impl_unittest.cc",
       "frame_combiner_unittest.cc",
       "gain_change_calculator.cc",
       "gain_change_calculator.h",
       "sine_wave_generator.cc",
       "sine_wave_generator.h",
     ]
     deps = [
       ":audio_frame_manipulator",
       ":audio_mixer_impl",
-      "..:module_api",
       "../../api:audio_mixer_api",
       "../../audio/utility:audio_frame_operations",
       "../../base:rtc_base",
       "../../base:rtc_base_approved",
       "../../test:test_support",
       "//testing/gmock",
     ]
   }
 }