You can get rid of the entire vacuum system on the right side of engine (left if looking under hood). The vacuum transducers and all that BS by the airbox are for turbo recirculation and EGR only. You can get rid of the airbox and airbox flapper/flow meter too as it’s only function is EGR as well.

__________________
{2010 Mazda 3 266,000mi} - daily since new, Airlift suspension + some chunky sway-bars: fastest pass 17.7@77MPH
{1987 300SDL 256,000mi} - stock turbo @ 22lbs straight piped + a whole bunch of pre-turbo water/meth injection, 722.3 with increased line pressure, special sauce, and shift kit: fastest pass 16.5@82
{1992 964 Carrera 4 Frankenstein ??,???mi} - 993 forward dated, Speedster conversion, GT45 + E85: fastest pass 12.5@113