Remove DOMImplementation.createCSSStyleSheet()

Source/core/dom/DOMImplementation.idl

 /*
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 18 matching lines @@
 
     // DOM Level 2
 
     [RaisesException] DocumentType createDocumentType(DOMString qualifiedName,
                                                       DOMString publicId,
                                                       DOMString systemId);
     [RaisesException] XMLDocument createDocument([TreatNullAs=NullString] DOMString namespaceURI,
                                                  [TreatNullAs=NullString] DOMString qualifiedName,
                                                  [Default=Undefined] optional DocumentType doctype);
 
-    // DOMImplementationCSS interface from DOM Level 2 CSS
-
-    [DeprecateAs=DOMImplementationCreateCSSStyleSheet]
-    CSSStyleSheet createCSSStyleSheet([Default=Undefined] optional DOMString title,
-                                      [Default=Undefined] optional DOMString media);
-
     // HTMLDOMImplementation interface from DOM Level 2 HTML
 
     HTMLDocument createHTMLDocument([Default=NullString] optional DOMString title);
 };