Come on, Commonwealth. The Post is reporting that just about nobody is showing up to vote in today’s congressional primaries in the 11th District. It’s a pretty big race, with Rep. Tom Davis leaving his long-held office and four Democrats vying for the nomination. But people seem to be suffering from election-lag after the months-long primary season. Don’t be discouraged; poling places are open until 7 p.m. The 11th District is one that carries…