If you haven’t heard by now, NBC has pretty much purged its Thursday Night comedy lineup, with the last straggler being the terminally optimistic Parks and Recreation, which will be heading into its final season in the new year. So as we say goodbye to Parks, and by extension the peacock’s once golden comedy block, let’s watch the trailer for the seventh and final season and remember about all the fun and laughs along the way. Like that time Councilman Jeremy Jamm got his ass laid out by Ron Swanson. Or that time Leslie Knope got drunk on moonshine and had an existential crisis in her talking head segments. Good times …