Remove debugging prints and comment out a few more tests in pkg/scheduled_test.

pkg/scheduled_test/lib/scheduled_process.dart

 // Copyright (c) 2013, 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 scheduled_process;
 
 import 'dart:async';
 import 'dart:io';
 
 import 'scheduled_test.dart';
@@ skipping 179 matching lines @@
   /// debug information if an error occurs.
   void _scheduleExceptionCleanup() {
     currentSchedule.onException.schedule(() {
       _stdoutSubscription.cancel();
       _stderrSubscription.cancel();
 
       if (!_process.hasValue) return;
 
       var killedPrematurely = false;
       if (!_exitCode.hasValue) {
-        var killedPrematurely = true;
+        killedPrematurely = true;
         _endExpected = true;
         _process.value.kill();
         // Ensure that the onException queue waits for the process to actually
         // exit after being killed.
         wrapFuture(_process.value.exitCode);
       }
 
       return Future.wait([
         _stdoutLog.toList(),
         _stderrLog.toList()
@@ skipping 86 matching lines @@
     schedule(() {
       _endExpected = true;
       return _exitCode.then((exitCode) {
         if (expectedExitCode != null) {
           expect(exitCode, equals(expectedExitCode));
         }
       });
     }, "waiting for process '$description' to exit");
   }
 }