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We have a primary domain www.postermywall.com. We have used subdomains for offering the same site in different languages, like es.postermywall.com, fr.postermywall.com etc. There are certain language subdomains that have low traffic and are expensive to get translated. We have decided to sunset 3 subdomains that match that criteria. What is the best way of going about removing those subdomains? Should we just redirect from those subdomains to www.postermywall.com? Would that have any negative impact on our primary domain in Google's eye etc.? Anything other than a redirect that we should be considering?