I'm trying to remove what I believe to be an unused namespace declaration from the output. eg:

Source:
<?xml version="1.0" encoding="ISO-8859-1"?>
<svg  viewBox="0 0 360 792" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:foo="http://www.foo.com">
<!-- svg content -->
</svg>

Becomes:
<?xml version="1.0" encoding="ISO-8859-1"?>
<svg  viewBox="0 0 360 792" xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink">
<!-- svg content -->
</svg>

ie, the foo namespace is removed in the transformation.

I've seen many posts on removing all namespaces, but can't figure out how to remove a specific namespace.

Any thoughts are greatly appreciated.