How to properly 404 pages from a subdomain

[evan89]

SO I am working on a site that had a subdomain that attracted a lot of spammy links.

I researched the backlinks to this subdomain, and there were no beneficial links at all. I am thinking the best thing is to 404 this subdomain. What is the best way to do this? Should I just edit the DNS settings so that this subdomain does not point to the root domain? Or is there something that should be done in webmaster tools?

Thanks in advance!

[AlanMosley]

That's all you need to do, is remove it via dns