Remove host header of a web application

Hi, Friends

I'd like to remove host header for a host head site, how do I do this?

I've seen some links like this : http://social.msdn.microsoft.com/Forums/sharepoint/en-US/cf63329c-6ba6-473b-ab1c-6be62345492a/removing-host-header-for-a-current-web-app?forum=sharepointadminlegacy

doesn't helpful, as I don't want to rename site or change alternate mapping., just want to remove host header, as I restored from a host header site.

Thanks,

~Rosone