For information on how to edit the mod's config, see here.
instantDeletionThis causes the deletion slot to delete items instantly, similar to Creative Mode.
enableDeleteKeysInCreativeSet to true if you want the delete keybindings to work in creative as well. Note: Items will be deleted permanently in creative, regardless of instantDeletion setting!
enableHintsTrashSlot will show a hint the first time the trash slot is toggled off or can be enabled on a supported screen. Set to false to disable.
allowDeletionWhileTrashSlotIsInvisibleNot recommended, but this will allow you to use the keybinds for deleting items even if the trash slot itself is hidden.
deletionDenyListList of items that cannot be deleted, in comma-separated format of "modid:name".