Remove GYP files.

device/sensors/sensors.gyp

-# Copyright 2016 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.
-
-{
-  'variables': {
-    'chromium_code': 1,
-    'mojom_files': [
-      'public/interfaces/light.mojom',
-      'public/interfaces/motion.mojom',
-      'public/interfaces/orientation.mojom',
-    ],
-  },
-  'targets': [
-    {
-      'target_name': 'device_sensors_mojo_bindings',
-      'type': 'static_library',
-      'sources': [ '<@(mojom_files)' ],
-      'includes': [
-        '../../mojo/mojom_bindings_generator.gypi',
-      ],
-      'variables': {
-        'use_new_wrapper_types': 'false',
-      },
-    },
-    {
-      'target_name': 'device_sensors_mojo_bindings_for_blink',
-      'type': 'static_library',
-      'sources': [ '<@(mojom_files)' ],
-      'variables': {
-        'for_blink': 'true',
-        'use_new_wrapper_types': 'false',
-      },
-      'includes': [
-        '../../mojo/mojom_bindings_generator.gypi',
-      ],
-    },
-  ],
-}