Remove the //ios/public/test target.

ios/ios_tests.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.
-{
-  'variables': {
-    'chromium_code': 1,
-   },
-  'targets': [
-    {
-      # GN version: //ios/public/test
-      'target_name': 'test_support_ios',
-      'type': 'static_library',
-      'sources': [
-        # TODO(crbug.com/437333): Move most of these files to
-        # //ios/chrome/ios_chrome_tests.gyp.
-        'public/test/fake_sync_service_factory.cc',
-        'public/test/fake_sync_service_factory.h',
-        'public/test/test_chrome_browser_provider.h',
-        'public/test/test_chrome_browser_provider.mm',
-        'public/test/test_chrome_provider_initializer.cc',
-        'public/test/test_chrome_provider_initializer.h',
-        'public/test/test_updatable_resource_provider.h',
-        'public/test/test_updatable_resource_provider.mm',
-      ],
-      'dependencies': [
-        '../base/base.gyp:base',
-        '../components/components.gyp:keyed_service_core',
-        '../components/components.gyp:keyed_service_ios',
-        '../components/components.gyp:sync_driver_test_support',
-        '../sync/sync.gyp:sync',
-        '../testing/gtest.gyp:gtest',
-        'provider/ios_provider_chrome.gyp:ios_provider_chrome_browser',
-      ],
-      'include_dirs': [
-        '..',
-      ],
-    },
-  ],
-}