aesthetics. were it me, i would let the puter know i removed it, if i did.
here is a cut/paste from the last post i did with EGR stuff (too lazy to try and type it again):
I'll take a stab at this.
i see no cons, unless you have a show car and like it clean under the hood (aesthetics).
the EGR only works at part throttle, so WOT performance is not affected. it sends spent gasses into the chambers, which cools the chambers. at the same time, injector pulsewidth is dialed back and a ton of timing is dialed-in (economy increase).
the main issue i see is letting the puter know you delted the EGR. some folks see part throttle detonation if they dont tune the car (chip, TwEECer, etc) after deleting the EGR. the EGR dilutes the mixture (inert gasses), which is why less fuel and more timing can be introduced (the diluted mixture is less volatile). now if those inert gasses are removed (EGR deletion), but the puter does not know, it will continue to dial back pulsewidth and add timing. hence detonation in cruise (EGR active) conditions.
some folks delete it and dont notice detonation, some do. just something to be aware of if you do get some.