[Question] Disabling unused blocks

(I did a search for this answer, but I couldn't find an answer).

Is it possible to disable the block IDs of certain blocks, such as blockITNT, that no one is currently using? I'd like to update another mod, but it adds a bunch of block IDs, and I have 0 remaining slots.

There are actually a small handful of block IDs we could disable, and I wouldn't mind disabling the nukes. We're not running a PvP server, so there's no reason for us to have them. (I've simply never disabled them before, because I haven't needed to).