Remove unused support files for old version of tools/test.py.

client/tests/dartc/testcfg.py

Index: client/tests/dartc/testcfg.py
diff --git a/client/tests/dartc/testcfg.py b/client/tests/dartc/testcfg.py
deleted file mode 100644
index efeb28356b39fed4e760407288696ca31aa215be..0000000000000000000000000000000000000000
--- a/client/tests/dartc/testcfg.py
+++ /dev/null
@@ -1,31 +0,0 @@
-# Copyright (c) 2011, 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.
-
-from testing import test_configuration
-
-def GetConfiguration(context, root):
-  return ClientCompilationTestConfiguration(context, root)
-
-
-class  ClientCompilationTestConfiguration(
-    test_configuration.CompilationTestConfiguration):
- def __init__(self, context, root):
-    super(ClientCompilationTestConfiguration, self).__init__(context, root)
-
- def SourceDirs(self):
-   return [
-      'async',
-      'base',
-      'box2d',
-      'dom',
-      'json',
-      'observable',
-      'samples',
-      'streams',
-      'testing',
-      'tests',
-      'touch',
-      'util',
-      'view',
-      'weld']