As noted here, 'dead' and 'code' tags (2 and 181 questions respectively) don't describe question in any way, technical or not. Shouldn't we remove them?
Moved to a separate request, as suggested by Gnoupi♦.
Yes, they are imo definitely superfluous.
[code] tag has however a few questions of which the tag actually needs to be merged with another tag, e.g.
[code]+[completion]. I have done it for a few questions.
Could there possibly be a more useless tag for a programming Q&A site?
I suggest computer.
Actually the codes tag is mostly worthless as well though far less popular (only 44 questions at the moment). It has questions ranging from "teh sorce codes" to QR codes and error codes. I'll go through and retag where appropriate but I wonder if it should be on the blacklist as well (there's certainly no appropriate tag synonym).