No, it's the responsibility of the person who believes that something which is accurate (as opposed to TIGER crap left over from Dave Hansen), but no longer present to move it to OHM. Why? Because we have NO notification system which tells an editor that (as you say) cares about the feature that someone has deleted it rather than moving it to OHM.

How about this plan: rather than create the absence of something (hard to detect that something doesn't exist anymore), if you think something belongs in OHM, then tag it with OHM=yes ?

If you agree this is reasonable, then I'll start promoting it.