The question, What's a word for “to eliminate the need for”?, has been voted as a duplicate of Is there a word that means “make someone (or something) redundant”? which is itself closed as a general reference question. IMO, one or both of these questions needs reopening. I think that the questions are not exact duplicates in as much as one talks about the redundancy of the need for something while the other simply talks about the redundancy of something; a sufficiently distinct nuance.
In any case, we do entertain single word questions on this site and therefore the Dec '11 question ought to be reopened.