SPRINGFIELD — For the state’s top court, the summer is usually pretty quiet.But this year, the seven justices and the state’s judiciary system have made a big adjustment — to life without Michael J. Tardy as top administrator.Tardy, 65, officially retired this month as the executive director of the Administrative Office of the Illinois Courts. He served more than five years at the helm and spent 40 years working for the judicial branch more generally.“The time is right,” he said in a …