Empty sound events exist for fungus blocks

While this was mentioned in MC-261260, which was resolved as a duplicate, the ticket it supposedly duplicates mentions neither of these sound events, so I'm reporting them separately.

There are two sound events that exist for when punching fungus or falling on them from a height. They display as suggested sound events in the /playsound autocomplete list, but actually attempting to play them produces no subtitle and will log an error.

To fix, either point these sound events to existing sound files, or remove the sound events entirely.