Never ran across one with no bleeder. I'd think there would be a way to flush it, since if you get a new assembly it too would have to be filled with fluid. It probably has to be removed and drained somehow. I'd rank this right up there with the auto transmissions with no dipstick.

 

GM started doing that sort of thing back in the 90's. If there was an issue with the clutch hydraulics, you replaced everything.... It came pre-assembled, filled with fluid, and already bled out.