[Gameplay] Rek'sai Echolocation Sounds

So, it used to be that, when you were burrowed as Rek'sai, you'd hear all kinds of clicking and throaty sounds (you know, echolocation) and it really made burrowing feel more realistic, and made me feel like a graboid. :P

But, those sounds are no longer around! I don't know if that's a bug or intentional, but I figured I'd report it anyway.