Fix dart2dart test status

tests/language/language_dart2js.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.
 
 [ $compiler == dart2js ]
 sync_generator2_test/07: MissingCompileTimeError # Issue 22324
 sync_generator2_test/08: MissingCompileTimeError # Issue 22324
 sync_generator2_test/10: MissingCompileTimeError # Issue 22324
 
 async_star_test/02: RuntimeError # 22853
@@ skipping 180 matching lines @@
 [ $compiler == dart2dart && $builder_tag == new_backend && $host_checked ]
 large_implicit_getter_test: Crash # Stack overflow
 
 [ $compiler == dart2dart && ($minified == true || $builder_tag == new_backend) ]
 type_variable_conflict2_test/01: RuntimeError # Issue 16180
 
 [ $compiler == dart2dart ]
 sync_generator2_test/07: MissingCompileTimeError # Issue 22324
 sync_generator2_test/08: MissingCompileTimeError # Issue 22324
 sync_generator2_test/10: MissingCompileTimeError # Issue 22324
-await_for_cancel_test: RuntimeError # Issue 21404
 
 regress_13494_test: Fail # Issue 22370
 
 enum_duplicate_test/01: CompileTimeError # Issue 22169
 
 built_in_identifier_prefix_test: Fail # Issue 6972
 constructor_initializer_test/none: Fail # Issue 12633
 
 # Mixins fail on the VM.
 mixin_with_two_implicit_constructors_test: Fail # Issue 11889
@@ skipping 51 matching lines @@
 invocation_mirror_test: Fail, OK # Issue 12706 (hardcoded names).
 super_call4_test: Fail, OK # hardcoded names.
 
 [ $minified ]
 stack_trace_test: Fail, OK # Stack trace not preserved in minified code.
 regress_21795_test: RuntimeError # Issue 12605
 
 [ $compiler == dart2js && $runtime == d8 && $system == windows ]
 *deferred*: Skip # Issue 17458
 cha_deopt*: Skip # Issue 17458