Removes an attribute by local name and namespace URI. If a default value
for the removed attribute is defined in the DTD, a new attribute immediately
appears with the default value as well as the corresponding namespace URI,
local name, and prefix when applicable.
Per the XML Namespaces specification, applications must use the value null
as the namespaceURI parameter for methods if they wish to have no namespace.
Removes an attribute by local name and namespace URI. If a default value for the removed attribute is defined in the DTD, a new attribute immediately appears with the default value as well as the corresponding namespace URI, local name, and prefix when applicable. Per the XML Namespaces specification, applications must use the value null as the namespaceURI parameter for methods if they wish to have no namespace.