Vermont didn't vote to impeach anybody. This is Town Meeting, a wonderfully anachronistic form of direct democracy that is very well known for passing all kinds of "outside business" that has absolutely no force of law other than as publicity. But none of them speaks for the state as a whole and even if every town in Vermont votes on it, it doesn't carry any weight (Vermont still has a standard representative legislature for statewide business).
So it is interesting but I can't say it is important.
For more information on Town Meeting,
First Tuesday in March is a radio show from Vermont Public Radio that talked about the institution, the difficulties it faces in our modern world, and the issue of "outside business." They played it on KQED (San Francisco NPR over the weekend and it was very interesting).
It is also worth nothing that when it says Putney, Vermont voted unanimously that this probably represents less than 10% of the population since most people do not go to Town Meeting.