Commented Issue: Generate XmlAttribute for Silverlight [13545]

In the method RemoveDefaultXmlAttributes, don't remove these attributes for Silverlight.
System.Xml.Serialization.XmlAttributeAttribute
System.Xml.Serialization.XmlTypeAttribute
System.Xml.Serialization.XmlElementAttribute
System.Xml.Serialization.XmlRootAttribute
(These attributes are supported in Silverlight 3, 4.)
Comments: I think, this is fixed with Changeset 91910.