Remove dart2dart support from testing scripts and status files

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 74 matching lines @@
 [ $runtime == jsshell ]
 async/test/stream_zip_test: RuntimeError, OK # Timers are not supported.
 
 [ $compiler == dart2js && $runtime == drt ]
 async/test/stream_zip_test: RuntimeError, Pass # Issue 18548
 
 [ $compiler == dart2js && ($runtime == chrome || $runtime == ff) ]
 collection/test/unmodifiable_collection_test: SkipSlow # Times out. Issue 22050
 async/test/stream_zip_test: SkipSlow # Times out. Issue 22050
 
-[$compiler == dart2dart]
-*: Skip
-
 [ $runtime == ie10 ]
 analyzer/test/generated/java_core_test: Pass, Timeout # Issue 19747
 typed_data/test/typed_buffers_test/none: Fail # Issue   17607 (I put this here explicitly, since this is not the same as on ie9)
 
 [ $runtime == safarimobilesim ]
 # Unexplained errors only occuring on Safari 6.1 and earlier.
 typed_data/test/typed_buffers_test: RuntimeError
 
 [ $runtime == vm && $system == windows ]
 analyzer/test/generated/all_the_rest_test: Fail # Issue 21772
@@ skipping 532 matching lines @@
 _internal/lib/pub/test/validator/size_test: Crash # unsupported element kind: _defaultEnvironment:field
 _internal/lib/pub/test/validator/utf8_readme_test: Crash # unsupported element kind: _defaultEnvironment:field
 _internal/lib/pub/test/version_solver_test: Crash #  try/finally
 js_ast/test/printer_callback_test: Crash # Please triage this failure.
 microlytics/test/dart_microlytics_test: Crash # (throw new ExpectException(message)): Unhandled node
 stub_core_library/test/stub_test: Crash #  try/finally
 third_party/di_tests/di_test: Crash #  try/finally
 typed_data/test/typed_buffers_test/01: Crash # cannot compile methods that need interceptor calling convention.
 typed_data/test/typed_buffers_test/none: Crash # cannot compile methods that need interceptor calling convention.
 typed_mock/test/typed_mock_test: Crash #  try/finally