Remove all remaining references to dartc

samples/tests/dartc/test_config.dart

-// 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.
-
-library client_dartc_test_config;
-
-import 'dart:io';
-import '../../../tools/testing/dart/test_suite.dart';
-
-class SamplesDartcTestSuite extends DartcCompilationTestSuite {
-  SamplesDartcTestSuite(Map configuration)
-      : super(configuration,
-              'dartc',
-              'samples',
-              [ 'actors',
-                'belay',
-                'calculator',
-                'chat',
-                'clock',
-                'dartcombat',
-                'hi',
-                'isolate',
-                'isolate_html',
-                'leap',
-                'logo',
-                'matrix',
-                'pond',
-                'sample_extension',
-                'slider',
-                'spirodraw',
-                'sunflower',
-                'swarm',
-                'tests',
-                'third_party',
-                'time',
-                'ui_lib',
-              ],
-              ['samples/tests/dartc/dartc.status']);
-
-  bool isTestFile(String filename) {
-    return filename.endsWith(".dart");
-  }
-
-  bool get listRecursively => true;
-}