Remove LibraryElement.isUpToDate().

pkg/analyzer/lib/src/dart/element/handle.dart

 // Copyright (c) 2014, 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 analyzer.src.generated.element_handle;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/constant/value.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
@@ skipping 798 matching lines @@
 
   @override
   List<LibraryElement> get visibleLibraries => actualElement.visibleLibraries;
 
   @override
   List<ImportElement> getImportsWithPrefix(PrefixElement prefixElement) =>
       actualElement.getImportsWithPrefix(prefixElement);
 
   @override
   ClassElement getType(String className) => actualElement.getType(className);
-
-  @override
-  bool isUpToDate(int timeStamp) => actualElement.isUpToDate(timeStamp);
 }
 
 /**
  * A handle to a [LocalVariableElement].
  */
 class LocalVariableElementHandle extends VariableElementHandle
     implements LocalVariableElement {
   /**
    * Initialize a newly created element handle to represent the element at the
    * given [_location]. The [_resynthesizer] will be used to resynthesize the
@@ skipping 283 matching lines @@
 
   @override
   bool get isStatic => actualElement.isStatic;
 
   @override
   DartType get type => actualElement.type;
 
   @override
   DartObject computeConstantValue() => actualElement.computeConstantValue();
 }