Remove legacy audio device glue files.

webrtc/modules/audio_device/main/source/audio_device.gypi

Index: webrtc/modules/audio_device/main/source/audio_device.gypi
diff --git a/webrtc/modules/audio_device/main/source/audio_device.gypi b/webrtc/modules/audio_device/main/source/audio_device.gypi
deleted file mode 100644
index 126eb98ac117b224a52abacb8bd275c115a1d949..0000000000000000000000000000000000000000
--- a/webrtc/modules/audio_device/main/source/audio_device.gypi
+++ /dev/null
@@ -1,14 +0,0 @@
-# Copyright (c) 2012 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.
-
-{
-  'includes': [
-    '../../audio_device.gypi',
-  ],
-}
-