Remove duplicate extensions unit tests from chrome_tests_unit.gypi

extensions/extensions.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': [
     {
@@ skipping 671 matching lines @@
         'common/test_util.h',
         'common/value_builder.cc',
         'common/value_builder.h',
         'renderer/test_extensions_renderer_client.cc',
         'renderer/test_extensions_renderer_client.h',
       ],
       # Disable c4267 warnings until we fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
     {
-      # TODO(tfarina): Our plan is to build and run this target on Chromium bots
-      # (TS, CQ, Waterfall). First we will get this target passing all tests,
-      # after that we will start the work on buildbot to get this running there.
-      # When we consider this stable in the bots, we can go to unit_tests target
-      # and remove the duplicated entries from there, otherwise if we just
-      # remove them right now we would be losing coverage.
+      # TODO(tfarina): Many extension unit tests run as part of Chrome's
+      # unit_tests target. They should be moved here, which may require some
+      # refactoring (ExtensionsBrowserClient, TestingProfile, etc.).
       # http://crbug.com/348066
       'target_name': 'extensions_unittests',
       'type': 'executable',
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:test_support_base',
         '../content/content_shell_and_tests.gyp:test_support_content',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         'extensions_common',
@@ skipping 42 matching lines @@
               '<(SHARED_INTERMEDIATE_DIR)/extensions/extensions_renderer_resources.pak',
             ],
             'pak_output': '<(PRODUCT_DIR)/extensions_unittests_resources.pak',
           },
           'includes': [ '../build/repack_action.gypi' ],
         },
       ],
     },
   ]
 }