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

dart/pkg/dartdoc/lib/src/dartdoc/nav.dart

-part of dartdoc;
-
 // 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.
 
 /*
  * Constant values used for encoding navigation info.
  *
  * The generated JSON data is a list of LibraryInfo maps, defined as follows:
  *
  *     LibraryInfo = {
@@ skipping 55 matching lines @@
     return 'constructor';
   } else if (kind == METHOD) {
     return 'method';
   } else if (kind == GETTER) {
     return 'getter';
   } else if (kind == SETTER) {
     return 'setter';
   }
   return '';
 }