93 regal 3.8 cruise control

[noclues]

I noticed the cruise control (which stopped working a long time ago) has a vacuum line connected to it (9/32?) and its going into what appears to be the evaporative canister line (though i cant see due to other cables around, i'm just assuming because they both disappear in the same area). is this vacuum line connected to the engine vacuum or is it a separate line (read somewhere it would be connected to the brake pedal somehow). how critical is this line and can i cut it off/remove it?
there's also a much thinner black wire coming into it with an inline fuse or check valve (round, white/black sides) attached to a T. is that another vacuum line or electrical?

Thanks!