Revert "Parts must start with 'part of'" and "Attempt to fix VM build"

dart/samples/ui_lib/util/DateUtils.dart

-part of utilslib;
-
 // 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.
 
 /**
  * General purpose date/time utilities.
  */
 class DateUtils {
   // TODO(jmesserly): localized strings
   static const WEEKDAYS = const ['Monday', 'Tuesday', 'Wednesday', 'Thursday',
@@ skipping 165 matching lines @@
     }
     String twoDigits(int n) {
       if (n >= 10) return "${n}";
       return "0${n}";
     }
     String mm =
         twoDigits(duration.inMinutes.remainder(Duration.MINUTES_PER_HOUR));
     return "${hours}:${mm} ${a}";
   }
 }