Remove GYP files in breakpad, build, and tools.

build/android/ndk.gyp

-# Copyright (c) 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.
-
-{
-  'targets': [
-    {
-      'target_name': 'cpu_features',
-      'type': 'static_library',
-      'direct_dependent_settings': {
-        'include_dirs': [
-          '<(android_ndk_root)/sources/android/cpufeatures',
-        ],
-      },
-      'sources': [
-        '<(android_ndk_root)/sources/android/cpufeatures/cpu-features.c',
-      ],
-      'variables': {
-        'clang_warning_flags': [
-          # cpu-features.c has few unused functions on x86 b/26403333
-          '-Wno-unused-function',
-        ],
-      },
-    },
-  ],
-}