Remove ClassElementImpl.withClauseRange.

pkg/analyzer/lib/src/generated/resolver.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.resolver;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
@@ skipping 12030 matching lines @@
   void _resolve(ClassElementImpl classElement, WithClause withClause,
       ImplementsClause implementsClause) {
     if (withClause != null) {
       List<InterfaceType> mixinTypes = _resolveTypes(
           withClause.mixinTypes,
           CompileTimeErrorCode.MIXIN_OF_NON_CLASS,
           CompileTimeErrorCode.MIXIN_OF_ENUM,
           CompileTimeErrorCode.MIXIN_OF_NON_CLASS);
       if (classElement != null) {
         classElement.mixins = mixinTypes;
-        classElement.withClauseRange =
-            new SourceRange(withClause.offset, withClause.length);
       }
     }
     if (implementsClause != null) {
       NodeList<TypeName> interfaces = implementsClause.interfaces;
       List<InterfaceType> interfaceTypes = _resolveTypes(
           interfaces,
           CompileTimeErrorCode.IMPLEMENTS_NON_CLASS,
           CompileTimeErrorCode.IMPLEMENTS_ENUM,
           CompileTimeErrorCode.IMPLEMENTS_DYNAMIC);
       if (classElement != null) {
@@ skipping 739 matching lines @@
     nonFields.add(node);
     return null;
   }
 
   @override
   Object visitNode(AstNode node) => node.accept(TypeResolverVisitor_this);
 
   @override
   Object visitWithClause(WithClause node) => null;
 }