Remove GYP files.

third_party/mozilla/mozilla.gyp

-# Copyright 2013 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': 'mozilla',
-      'type': '<(component)',
-      'sources': [
-        'MozillaExport.h',
-        'NSPasteboard+Utils.h',
-        'NSPasteboard+Utils.mm',
-        'NSScreen+Utils.h',
-        'NSScreen+Utils.m',
-        'NSString+Utils.h',
-        'NSString+Utils.mm',
-        'NSURL+Utils.h',
-        'NSURL+Utils.m',
-        'NSWorkspace+Utils.h',
-        'NSWorkspace+Utils.m',
-      ],
-      'defines': [
-        'MOZILLA_IMPLEMENTATION',
-      ],
-      'link_settings': {
-        'libraries': [
-          '$(SDKROOT)/System/Library/Frameworks/AppKit.framework',
-        ],
-      },
-      'dependencies': [
-        '../../base/base.gyp:base',
-        '../../url/url.gyp:url_lib',
-      ],
-      'conditions': [
-        ['component=="shared_library"',
-          {
-            # Needed to link to Obj-C static libraries.
-            'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-ObjC']},
-          }
-        ],
-      ],
-    },
-  ],
-}