Remove unused fields in analyzer.

pkg/analyzer/lib/src/services/formatter_impl.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 formatter_impl;
 
 import 'dart:math';
 
 import 'package:analyzer/analyzer.dart';
 import 'package:analyzer/src/generated/parser.dart';
@@ skipping 41 matching lines @@
     var errorCode = errors[0].errorCode;
     var phase = errorCode is ParserErrorCode ? 'parsing' : 'scanning';
     return 'An error occured while $phase (${errorCode.name}).';
   }
 
   String toString() => '$message';
 }
 
 /// Specifies the kind of code snippet to format.
 class CodeKind {
-
-  final int _index;
-
-  const CodeKind._(this._index);
+  const CodeKind._();
 
   /// A compilation unit snippet.
-  static const COMPILATION_UNIT = const CodeKind._(0);
+  static const COMPILATION_UNIT = const CodeKind._();
 
   /// A statement snippet.
-  static const STATEMENT = const CodeKind._(1);
+  static const STATEMENT = const CodeKind._();
 
 }
 
 /// Dart source code formatter.
 abstract class CodeFormatter {
 
   factory CodeFormatter([FormatterOptions options = const FormatterOptions()])
                         => new CodeFormatterImpl(options);
 
   /// Format the specified portion (from [offset] with [length]) of the given
@@ skipping 1762 matching lines @@
   @override
   visitEnumConstantDeclaration(EnumConstantDeclaration node) {
     // TODO: implement visitEnumConstantDeclaration
   }
 
   @override
   visitEnumDeclaration(EnumDeclaration node) {
     // TODO: implement visitEnumDeclaration
   }
 }