Remove left-over from bad merge.

tools/testing/dart/test_runner.dart

 // 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.
 
 /**
  * Classes and methods for executing tests.
  *
  * This module includes:
  * - Managing parallel execution of tests, including timeout checks.
  * - Evaluating the output of each test as pass/fail/crash/timeout.
@@ skipping 1933 matching lines @@
                 // sample the threads once.
                 executable = '/usr/bin/sample';
               } else if (io.Platform.isWindows) {
                 bool is_x64 = command.executable.contains("X64") ||
                               command.executable.contains("SIMARM64");
                 var win_sdk_path = configuration['win_sdk_path'];
                 if (win_sdk_path != null) {
                   executable = win_sdk_path +
                       "\\Debuggers\\" + (is_x64 ? "x64" : "x86") + "\\cdb.exe";
                   diagnostics.add("Using $executable to print stack traces");
-                  arguments = ['-p', '${process.pid}', '-c', '!uniqstack;qd'];
                 } else {
                   diagnostics.add("win_sdk path not found");
                 }
               } else {
                 diagnostics.add("Capturing stack traces on"
                                 "${io.Platform.operatingSystem} not supported");
               }
               if (executable != null) {
                 var pid_list = await _getPidList(process.pid, diagnostics);
                 diagnostics.add("Process list including children: $pid_list");
@@ skipping 1343 matching lines @@
     }
   }
 
   void eventAllTestsDone() {
     for (var listener in _eventListener) {
       listener.allDone();
     }
     _allDone();
   }
 }