remove item from hash in steve?

How to remove an item from a hash in steve, i.e. remove the (key,value) pair entirely?
I tried "remove myhash{key}" but breve says it expects a list.
Indeed I couldn't see any method to remove items from a hash in util/hash.cc.
Is it there where the hash data structure for steve is implemented? Is there an easy fix for this?
Initially I thought I could implement the remove method myself in hash.cc, but I'm not such an expert in breve, so I wouldn't know how to link it all the way up to steve. Any hints are welcome. Thanks!