Yes, if you look down the back of the engine you will see the solenoid valve sitting on the accumulator. It, the accumulator, supplies both throttle and VNT solenoids so a leak in either will defeat both systems, but not the brake servo because of the restriction between the accumulator and the vacuum pump.
I'm confused too about the bypassing because the throttle solenoid can defeat the VNT and cause late boost, by leaking, but can't cause over-boost. Anyway, the accumulator must stay because the VNT and throttle won't work fast enough without it. If you have late boost because of a leak in the throttle solenoid you could disable it as I described above, but your engine will judder at key-off.