Removes the specified namespace from a collection.
In MSXML 6.0, when a schema is added to the SchemaCache, it can import schemas from other namespaces. Furthermore, all schemas added to the SchemaCache can be merged with schemas that have the same namespace. Therefore, the remove method no longer reverses the actions taken when you call the add method. The remove method is deprecated in MSXML 6.0, and throws a Not Implemented exception.