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Hi Chase! Did Gaston and/or David answer your question? If so, mind marking one or both responses as a Good Answer? Otherwise, how can we still help?

Hi Chase, Removing dev via web master tools should do the trick for now. Then since google won't get to dev anymore you should be safe. Adding both noindex and password protection is not needed. Since it's password protected Google won't get to see the noindex on the pages. So you should only do one of the two. No need to change now. The password protection is safe. As expected 'dev.chiplab.com' was removed from the SERP.  Now, I'm a bit worried that the link equity was transferred for good to the subdomain from 'www.chiplab.com'.  That's not possible, right? *** Yes, that's not possible so you are good. Only 301 redirections are "mandatory" for Google to pass equity - so all good.