Fix 'Unused local variable' hints in analyzer and analysis_server.

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 1276 matching lines @@
     indent();
     newlines();
     visitNodes(node.members, separatedBy: newlines, followedBy: newlines);
     token(node.rightBracket, precededBy: unindent);
 
   }
 
   visitSymbolLiteral(SymbolLiteral node) {
     token(node.poundSign);
     var components = node.components;
-    var size = components.length;
     for (var component in components) {
       // The '.' separator
       if (component.previous.lexeme == '.') {
         token(component.previous);
       }
       token(component);
     }
   }
 
   visitThisExpression(ThisExpression node) {
@@ skipping 537 matching lines @@
   @override
   visitEnumConstantDeclaration(EnumConstantDeclaration node) {
     // TODO: implement visitEnumConstantDeclaration
   }
 
   @override
   visitEnumDeclaration(EnumDeclaration node) {
     // TODO: implement visitEnumDeclaration
   }
 }