[analyzer] remove "auto-generated do not edit" comments

pkg/analyzer/lib/src/generated/html.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.
 
-// This code was auto-generated, is not intended to be edited, and is subject to
-// significant change. Please see the README file for more information.
-
 library engine.html;
 
 import 'dart:collection';
 
 import 'ast.dart';
 import 'element.dart';
 import 'engine.dart' show AnalysisOptions, AnalysisEngine;
 import 'error.dart' show AnalysisErrorListener;
 import 'java_core.dart';
 import 'java_engine.dart';
@@ skipping 1859 matching lines @@
  */
 abstract class XmlVisitor<R> {
   R visitHtmlScriptTagNode(HtmlScriptTagNode node);
 
   R visitHtmlUnit(HtmlUnit htmlUnit);
 
   R visitXmlAttributeNode(XmlAttributeNode xmlAttributeNode);
 
   R visitXmlTagNode(XmlTagNode xmlTagNode);
 }