Well, does she WANT services?
In College/University, the services for AS itself really dry up. If anything, her best bet would be a Career Centre (and those are accessible to anyone). They teach you interview skills, resume building, networking skills.
Disability services in University only helps if you have an additional learning, or physical disability on top of AS (you require someone to take your notes for you, you need extended time on tests, voc rehab can approve you for funded tutoring).
But they can't find friends for you, they can't make people like you, and they can't set you up with a job.
I can see why your friend wouldn't want the label anymore, especially if they're still focusing on "taking turns" in your high school social skills class. That's the kind of stuff most children learn in Kindergarten. Even the AS children should be learning that by early elementary.
If her parents instilled many social lessons in her, and didn't rely on the schools to teach her that, then it's possible that she's considerably ahead of her peers that didn't receive parental instruction.
While it's true that "undiagnosing" her would eliminate the services, there aren't any services for people with mild AS in the first place. Sure, there are independent living resources. But to be perfectly honest, what I've seen is primarily intended for mentally ret*d people. You can either have someone come to your apartment periodically, and do your work FOR you (an "assisted independent living" scenario). Or, there are the group homes where you have people watching you 24/7.
Neither of these situations are very good for self-esteem purposes, or for the development of independent living skills (ironically enough).
If your friend were to approach a counsellor and say "I would like to be set up with advanced social skills classes that teaches people how to network effectively, and how to influence people to reach my goals", they would probably look at her as if she had two heads. Unless you live in a metropolis, that MIGHT have services like that, it's just too much work to track those things down. Unless you're willing to give up school or work time. That, and you would have to pay through the nose for them.
It is generally assumed that all a person with AS needs is the basics, and the advanced stuff will come in time. That's not necessarily true. Some people learned the basics on their own, but still have trouble with advanced social skills.