Removing Air from the ABS reservoir?

Hey guys,
a while back, I upgraded my suspension from Gen 2 to Gen 3 spring/shock combo, and as you would know, you have to disconnect the brake line from the caliper to do so.
 
The problem being that I then went and got a business (I won't say who) to suck the air out of the lines. They (very cleverly) didn't keep an eye on the master cylinder, so air went through and got stuck in the ABS reservoir. The lines are 100% air free and my pedal has been spongy for quite some time while I try to think of a way to get the air out.
 
So far, I've come up with nothing, so does anyone have any advice on getting the air out?
 
I'm planning on upgrading to later model brakes at a later date, but working brakes in a daily would be a nice change of pace :)