Get rid of [Callback] extended attribute for parameters in IDL files

Source/modules/filesystem/DOMWindowFileSystem.idl

Index: Source/modules/filesystem/DOMWindowFileSystem.idl
diff --git a/Source/modules/filesystem/DOMWindowFileSystem.idl b/Source/modules/filesystem/DOMWindowFileSystem.idl
index f8969df12cef3087af86fa487eedb23e5a29bdd1..c42fe21b26b12d9b52122035d9b4fa811f61cf4e 100644
--- a/Source/modules/filesystem/DOMWindowFileSystem.idl
+++ b/Source/modules/filesystem/DOMWindowFileSystem.idl
@@ -29,8 +29,8 @@ partial interface DOMWindow {
     const unsigned short PERSISTENT = 1;
 
     [EnabledAtRuntime=FileSystem] void webkitRequestFileSystem(unsigned short type, long long size,
-            [Callback] FileSystemCallback successCallback, [Callback] optional ErrorCallback errorCallback);
+            FileSystemCallback successCallback, optional ErrorCallback errorCallback);
     [EnabledAtRuntime=FileSystem] void webkitResolveLocalFileSystemURL(DOMString url,
-            [Callback] EntryCallback successCallback, [Callback] optional ErrorCallback errorCallback);
+            EntryCallback successCallback, optional ErrorCallback errorCallback);
 };