Sounds: Remove 'default_dig_crumbly' from leaves defaults table
Sounds: Remove 'default_dig_crumbly' from leaves defaults table

Now that the missing 'default_dig_snappy' sound has been added we can
remove the dirt dig sound from the table. All nodes that use the
leaves defaults table have group 'snappy' so 'default_dig_snappy' now
becomes their default dig sound.

evrooije/beerarchy,evrooije/beerarchy,evrooije/beerarchy