Remove XMLNS attribute

Hello ,
Is there a way to remove XMLNS attribute from the root node.I have read in lot of artilces that it cannot be removed as namespace has been attached to all the other elements . But In my case i am just using it to validate the file against one schema and then i need to save that xml file without the XMLNS attribute because it is been used by other system which cannot parse the file if there is a Namespace.

Thank You in advance,
Preet