feat: remove experience

Minecraft.World/WaterAnimal.cpp

@@ -34,9 +34,4 @@ int WaterAnimal::getAmbientSoundInterval()
 bool WaterAnimal::removeWhenFarAway()
 {
 	return true;
-}
-
-int WaterAnimal::getExperienceReward(shared_ptr<Player> killedBy)
-{
-	return 1 + level->random->nextInt(3);
 }