2d76190091
Reduces memory by a tiny bit. Arguably we never needed tombstones because entries are never removed, so there shouldn't be any performance hit there. We don't even need a 'used' flag either, considering that can be represented by a NULL value, but I'm not really up for implementing/modifying my own hash table. ref: https://attractivechaos.wordpress.com/2019/12/28/deletion-from-hash-tables-without-tombstones/