remove serialization. it's moved to github

pkg/pkg.status

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # Don't run any test-like files that show up in packages directories. It
 # shouldn't be necessary to run "pub install" in these packages, but if you do
 # it shouldn't break the tests.
 */packages/*/*: Skip
 */*/packages/*/*: Skip
 */*/*/packages/*/*: Skip
@@ skipping 365 matching lines @@
 matcher/test/*_minified_test: Skip # DO NOT COPY THIS UNLESS YOU WORK ON DART2JS
 
 [ $arch == simarm && $checked ]
 watcher/test/directory_watcher/linux_test: Skip # Issue 16118
 
 [ $arch == simarm64 ]
 # Timeout. These are not unit tests. They do not run efficiently on our
 # simulator.
 *: Skip
 
-# Skip serialization test that explicitly has no library declaration in the
-# test on Dartium, which requires all tests to have a library.
 [ $compiler == none && ( $runtime == dartium || $runtime == drt || $runtime == ContentShellOnAndroid) ]
-serialization/test/no_library_test: Skip # Expected Failure
-serialization/test/serialization_test: Fail # 13921
 unittest/test/async_exception_test: RuntimeError # 13921
 unittest/test/async_exception_with_future_test: RuntimeError # 13921
 unittest/test/async_setup_teardown_test: RuntimeError # 13921
 unittest/test/completion_test: RuntimeError # 13921
 unittest/test/correct_callback_test: RuntimeError # 13921
 unittest/test/exception_test: RuntimeError # 13921
 unittest/test/excess_callback_test: RuntimeError # 13921
 unittest/test/expect_async_args_test: RuntimeError # 13921
 unittest/test/expect_async_test: RuntimeError # 13921
 unittest/test/group_name_test: RuntimeError # 13921
@@ skipping 61 matching lines @@
 third_party/angular_tests/browser_test/change_detection/dirty_checking_change_detector: Skip # Issue 17152
 
 [ $use_repository_packages ]
 analyzer/test/*: PubGetError
 
 [ $runtime == drt ]
 http/test/html/client_test: Skip # Issue 18566
 
 [ $system == windows ]
 analysis_server/test/integration/search/get_type_hierarchy_test: Pass, Fail # Issue 20436