Remove GYP files.

third_party/iaccessible2/iaccessible2.gyp

-# Copyright (c) 2012 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': {
-    'midl_out_dir': '<(SHARED_INTERMEDIATE_DIR)/third_party/iaccessible2',
-  },
-  'targets': [
-    {
-      'target_name': 'iaccessible2',
-      'type': 'static_library',
-      'variables': {
-        'clang_warning_flags': [
-          # MIDL generates code like "#endif !_MIDL_USE_GUIDDEF_"
-          '-Wno-extra-tokens',
-        ],
-      },
-      'sources': [
-        'ia2_api_all.idl',
-        '<(midl_out_dir)/ia2_api_all.h',
-        '<(midl_out_dir)/ia2_api_all_i.c',
-      ],
-      'hard_dependency': 1,
-      'msvs_settings': {
-        'VCMIDLTool': {
-          'OutputDirectory': '<(midl_out_dir)',
-          'DLLDataFileName': 'dlldata.c',
-         },
-      },
-      'direct_dependent_settings': {
-        'include_dirs': [
-          '<(SHARED_INTERMEDIATE_DIR)',
-        ],
-      },
-    },
-  ],
-}