Remove dart2dart support from testing scripts and status files

runtime/tests/vm/vm.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.
 
 # These tests are expected to crash on all platforms.
 cc/ArrayNew_Overflow_Crash: Crash
 cc/AllocGeneric_Overflow: Crash
 cc/CodeImmutability: Crash
 
 cc/SNPrint_BadArgs: Skip
@@ skipping 62 matching lines @@
 dart/error_stacktrace_test: Crash # Instance of 'TypeOperator': unimplemented in CodeGenerator
 dart/inline_stack_frame_test: Crash # (throw new ExpectException(message)): Unhandled node
 dart/optimized_stacktrace_test: Crash # (throw new ExpectException(message)): Unhandled node
 
 [ $runtime == vm ]
 dart/data_uri_failures_test/wrongmime: RuntimeError, OK # VM is more restrictive than the browser
 dart/data_uri_failures_test/nomime: RuntimeError, OK
 dart/data_uri_failures_test/nocharset: RuntimeError, OK
 dart/data_uri_failures_test/base64: RuntimeError, OK
 
-[ $compiler == dart2dart ]
-# Skip until we stabilize language tests.
-*: Skip
-
 [ $arch == mips ]
 cc/StaticNonNullSumCallCodegen: Crash, Pass # Issue 17440
 cc/ArrayLengthMaxElements: Crash  # Issue 23275
 
 [ $arch == mips && $mode == debug ]
 cc/FindCodeObject: Skip # Takes more than 8 minutes. Issue 17440
 
 [ $compiler == dartanalyzer || $compiler == dart2analyzer ]
 dart/optimized_stacktrace_test: StaticWarning
 
 [ $runtime != vm ]
 dart/snapshot_version_test: SkipByDesign  # Spawns processes
 
 [ $runtime == vm && $mode == debug && $builder_tag == asan ]
 cc/Dart2JSCompileAll: Skip  # Timeout.