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

Source/modules/webdatabase/SQLTransaction.idl

 /*
  * Copyright (C) 2007 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 13 matching lines @@
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 [
     ImplementationLacksVTable
 ] interface SQLTransaction {
     [Custom] void executeSql(DOMString sqlStatement,
                              ObjectArray arguments,
-                             [Callback] optional SQLStatementCallback callback,
-                             [Callback] optional SQLStatementErrorCallback errorCallback);
+                             optional SQLStatementCallback callback,
+                             optional SQLStatementErrorCallback errorCallback);
+
 };