Remove dart2dart support from testing scripts and status files

tools/bots/bot.py

 #!/usr/bin/python
 
 # 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.
 
 """
 Shared code for use in the buildbot scripts.
 """
 
 import optparse
 import os
 from os.path import abspath
 from os.path import dirname
 import subprocess
 import sys
 
 DART_PATH = dirname(dirname(dirname(abspath(__file__))))
 
 BUILDER_NAME = 'BUILDBOT_BUILDERNAME'
 BUILDER_CLOBBER = 'BUILDBOT_CLOBBER'
 
 
 class BuildInfo(object):
   """
   Encapsulation of build information.
 
-  - compiler: None, 'dart2dart' or 'dart2js'
+  - compiler: None or 'dart2js'
   - runtime: 'd8', 'ie', 'ff', 'safari', 'chrome', 'opera', or None.
   - mode: 'debug' or 'release'.
   - system: 'linux', 'mac', or 'win7'.
   - checked: True if we should run in checked mode, otherwise False.
   - host_checked: True if we should run in host checked mode, otherwise False.
   - minified: True if we should minify the code, otherwise False
   - shard_index: The shard we are running, None when not specified.
   - total_shards: The total number of shards, None when not specified.
   - is_buildbot: True if we are on a buildbot (or emulating it).
   - test_set: Specification of a non standard test set or None.
@@ skipping 215 matching lines @@
   if exit_code != 0:
     raise OSError(exit_code)
 
 
 def GetStepName(name, flags):
   """
   Filters out flags with '=' as this breaks the /stats feature of the buildbot.
   """
   flags = [x for x in flags if not '=' in x]
   return ('%s tests %s' % (name, ' '.join(flags))).strip()