Revert "Add Selection.toString() calling the native method"

sdk/lib/html/dart2js/html_dart2js.dart

Index: sdk/lib/html/dart2js/html_dart2js.dart
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index 14dd61a7c6bcc9045adc47cd815aec30ddd5938d..a1e5a4c422af450fdad3006a0e037ad24de79107 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -29273,13 +29273,12 @@ class SelectElement extends HtmlElement {
     }
   }
 }
-// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2012, 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.
 
-// WARNING: Do not edit - generated code.
-
 
+@DocsEditable()
 @DomName('Selection')
 @Native("Selection")
 class Selection extends Interceptor {
@@ -29395,10 +29394,6 @@ class Selection extends Interceptor {
   @DocsEditable()
   @Experimental() // non-standard
   void setPosition(Node node, [int offset]) native;
-
-  @DomName('Selection.toString')
-  @DocsEditable()
-  String toString() native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a