[MC-235101] Unnecessary method override for dispenser behaviors

Using Yarn mappings, the following method exists in the BoatDispenserBehavior class:

@Override
protected void playSound(BlockPointer pointer) {
	pointer.world().syncWorldEvent(WorldEvents.DISPENSER_DISPENSES, pointer.pos(), 0);
}

The immediate superclass, ItemDispenserBehavior, implements the method in the same way, though through invoking a static method:

protected void playSound(BlockPointer pointer) {
	syncDispensesEvent(pointer);
}

private static void syncDispensesEvent(BlockPointer pointer) {
	pointer.world().syncWorldEvent(WorldEvents.DISPENSER_DISPENSES, pointer.pos(), 0);
}

Since the two implementations have the same effect, the BoatDispenserBehavior#playSound override is unnecessary.