Remove DOMImplementation.createCSSStyleSheet()

Source/core/dom/DOMImplementation.idl

Index: Source/core/dom/DOMImplementation.idl
diff --git a/Source/core/dom/DOMImplementation.idl b/Source/core/dom/DOMImplementation.idl
index 7f31def51b7e1cd3f6854256b1982c8fdb464c55..46f087a584c516123d46ed8a9939cb94ad4abfd7 100644
--- a/Source/core/dom/DOMImplementation.idl
+++ b/Source/core/dom/DOMImplementation.idl
@@ -36,12 +36,6 @@
                                                  [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);