Reverts 41378 for test failure.

Review URL: https://codereview.chromium.org//688443005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@41386 260f80e4-7a28-3924-810f-c04153c831b5
diff --git a/runtime/bin/process_patch.dart b/runtime/bin/process_patch.dart
index 2de6ba6..9e374ae 100644
--- a/runtime/bin/process_patch.dart
+++ b/runtime/bin/process_patch.dart
@@ -451,9 +451,6 @@
       return encoding.decode(output);
     }
 
-    _stdin._sink.destroy();
-    _processes.remove(_serviceId);
-
     return new _ProcessResult(
         result[0],
         result[1],