Revert of [Android] Add gyp support for multidex.

build/android/main_dex_action.gypi

Index: build/android/main_dex_action.gypi
diff --git a/build/android/main_dex_action.gypi b/build/android/main_dex_action.gypi
deleted file mode 100644
index 06717ddcff61033f445597296aca597126ba2f36..0000000000000000000000000000000000000000
--- a/build/android/main_dex_action.gypi
+++ /dev/null
@@ -1,44 +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.
-
-# This file is meant to be included into an action to provide a rule that
-# generates a list of classes that must be kept in the main dex file.
-#
-# To use this, create a gyp target with the following form:
-#  {
-#    'action_name': 'some name for the action'
-#    'actions': [
-#      'variables': {
-#        'jar_path': 'path to jar',
-#        'output_path': 'output path'
-#      },
-#      'includes': [ 'relative/path/to/main_dex_action.gypi' ],
-#    ],
-#  },
-#
-
-{
-  'message': 'Generating main dex classes list for <(jar_path)',
-  'variables': {
-    'jar_path%': '',
-    'output_path%': '',
-    'main_dex_list_script': '<(DEPTH)/build/android/gyp/main_dex_list.py',
-    'main_dex_rules_path': '<(DEPTH)/build/android/main_dex_classes.flags',
-  },
-  'inputs': [
-    '<(jar_path)',
-    '<(main_dex_list_script)',
-    '<(main_dex_rules_path)',
-  ],
-  'outputs': [
-    '<(output_path)',
-  ],
-  'action': [
-    'python', '<(main_dex_list_script)',
-    '--main-dex-list-path', '<(output_path)',
-    '--android-sdk-tools', '<(android_sdk_tools)',
-    '--main-dex-rules-path', '<(main_dex_rules_path)',
-    '<(jar_path)',
-  ]
-}