The suicide is hardly beside the point. Please do note that the author is Kevin Poulsen and he writes:

"His jury trial was looming when Swartz took his own life in January, 2013.

MIT faced a firestorm of criticism in the wake of Swartz’s suicide. Critics, including Swartz’s family and prominent MIT alumni, said the institution betrayed its own principles by not advocating for less harsh treatment of Swartz."

I can't see how "undid" would point to anything other than his "not being here". His presence being undone. His life being undone. If he would have been incarcerated for life, I don't think Kevin would use the word "undid". He would print "Free Aaron" stickers, and getting the word out that this fight should not be over.