Remove dart2dart support from testing scripts and status files

tools/testing/dart/test_options.dart

 // Copyright (c) 2013, 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.
 
 library test_options_parser;
 
 import "dart:io";
 import "drt_updater.dart";
 import "test_suite.dart";
 import "path.dart";
@@ skipping 42 matching lines @@
               ['-m', '--mode'],
               ['all', 'debug', 'release'],
               'debug'),
           new _TestOptionSpecification(
               'compiler',
               '''Specify any compilation step (if needed).
 
    none: Do not compile the Dart code (run native Dart code on the VM).
          (only valid with the following runtimes: vm, drt)
 
-   dart2dart: Compile Dart code to Dart code
-              (only valid with the following runtimes: vm, drt)
-
    dart2js: Compile dart code to JavaScript by running dart2js.
          (only valid with the following runtimes: d8, drt, chrome,
          safari, ie9, ie10, ie11, firefox, opera, chromeOnAndroid,
          none (compile only)),
 
    dartanalyzer: Perform static analysis on Dart code by running the analyzer on Java.
    dart2analyzer: Perform static analysis on Dart code by running the analyzer on Dart.
           (only valid with the following runtimes: none)''',
               ['-c', '--compiler'],
-              ['none', 'dart2dart', 'dart2js', 'dartanalyzer', 'dart2analyzer'],
+              ['none', 'dart2js', 'dartanalyzer', 'dart2analyzer'],
               'none'),
           // TODO(antonm): fix the option drt.
           new _TestOptionSpecification(
               'runtime',
               '''Where the tests should be run.
     vm: Run Dart code on the standalone dart vm.
 
     d8: Run JavaScript from the command line using v8.
 
     jsshell: Run JavaScript from the command line using firefox js-shell.
@@ skipping 558 matching lines @@
         // with dart2js, we should remove it from here.
         validRuntimes = const ['d8', 'jsshell', 'drt', 'none', 'dartium',
                                'ff', 'chrome', 'safari', 'ie9', 'ie10', 'ie11',
                                'opera', 'chromeOnAndroid', 'safarimobilesim'];
         break;
       case 'dartanalyzer':
       case 'dart2analyzer':
         validRuntimes = const ['none'];
         break;
       case 'none':
-      case 'dart2dart':
         validRuntimes = const ['vm', 'drt', 'dartium',
                                'ContentShellOnAndroid', 'DartiumOnAndroid'];
         break;
     }
     if (!validRuntimes.contains(config['runtime'])) {
       isValid = false;
       print("Warning: combination of compiler '${config['compiler']}' and "
           "runtime '${config['runtime']}' is invalid. "
           "Skipping this combination.");
     }
@@ skipping 232 matching lines @@
         return option;
       }
     }
     print('Unknown test option $name');
     exit(1);
   }
 
 
   List<_TestOptionSpecification> _options;
 }