The localhost has been on the burner for some time now. Users that know the term, will know that it is the name of the system itself, a network loopback. In the last 30 days, nobody answered any of those questions and nobody seems to continuously use the tag. It should just get removed as it get tagled with questions about apache, networking, ssh, lamp, dns, etc.
Case point where the localhost tag doesn't add anything to the question nor serve to search it more easily.