Remove dart2dart support from testing scripts and status files

tools/testing/dart/test_runner.dart

 // 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.
 
 /**
  * Classes and methods for executing tests.
  *
  * This module includes:
  * - Managing parallel execution of tests, including timeout checks.
  * - Evaluating the output of each test as pass/fail/crash/timeout.
@@ skipping 1546 matching lines @@
       List<int> stdout, List<int> stderr, Duration time,
       bool compilationSkipped)
       : super(command, exitCode, timedOut, stdout, stderr, time,
               compilationSkipped, 0);
 
   Expectation result(TestCase testCase) {
     // Handle general crash/timeout detection.
     if (hasCrashed) return Expectation.CRASH;
     if (hasTimedOut) return Expectation.TIMEOUT;
 
-    // Handle dart2js/dart2dart specific crash detection
+    // Handle dart2js specific crash detection
     if (exitCode == DART2JS_EXITCODE_CRASH ||
         exitCode == VmCommandOutputImpl.DART_VM_EXITCODE_COMPILE_TIME_ERROR ||
         exitCode == VmCommandOutputImpl.DART_VM_EXITCODE_UNCAUGHT_EXCEPTION) {
       return Expectation.CRASH;
     }
 
     // Multitests are handled specially
     if (testCase.expectCompileError) {
       // Nonzero exit code of the compiler means compilation failed
       // TODO(kustermann): Do we have a special exit code in that case???
@@ skipping 1382 matching lines @@
     }
   }
 
   void eventAllTestsDone() {
     for (var listener in _eventListener) {
       listener.allDone();
     }
     _allDone();
   }
 }