Remove dart2dart support from testing scripts and status files

tools/testing/dart/status_reporter.dart

 // Copyright (c) 2015, 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.
 
 import 'dart:io';
 import 'dart:convert';
 
 List<Map> LINUX_COMBINATIONS = [
     {
       'runtimes' : ['none'],
       'modes' : ['release'],
       'archs' : ['ia32'],
       'compiler' : 'dartanalyzer'
     },
     {
       'runtimes' : ['vm'],
       'modes' : ['debug', 'release'],
       'archs' : ['ia32', 'x64', 'simarm', 'simmips'],
       'compiler' : 'none'
     },
     {
-      'runtimes' : ['vm'],
-      'modes' : ['release'],
-      'archs' : ['ia32', 'x64'],
-      'compiler' : 'dart2dart'
-    },
-    {
       'runtimes' : ['d8', 'jsshell', 'chrome', 'ff'],
       'modes' : ['release'],
       'archs' : ['ia32'],
       'compiler' : 'dart2js'
     },
     {
       'runtimes' : ['dartium'],
       'modes' : ['release', 'debug'],
       'archs' : ['ia32'],
       'compiler' : 'none'
@@ skipping 173 matching lines @@
             var pct = 100*(value/total);
             values.add('${pct.toStringAsFixed(3)}%');
           }
 
           print(values.join(','));
         }
       }
     }
   }
 }