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

pkg/analyzer/lib/src/generated/sdk.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.sdk;
 
 import 'dart:collection';
 
 import 'ast.dart';
 import 'engine.dart' show AnalysisContext;
 import 'source.dart' show ContentCache, Source, UriKind;
 
 /**
  * A Dart SDK installed in a specified location.
@@ skipping 360 matching lines @@
     _platforms |= DART2JS_PLATFORM;
   }
 
   /**
    * Record that this library can be run on the VM.
    */
   void setVmLibrary() {
     _platforms |= VM_PLATFORM;
   }
 }