Brach's Confections - makers of StarBrite Mints, Milk Maid Caramels, Maple Nut Goodies and nearly 200 other varieties - plans to shut down its nearly century-old factory complex in Chicago by the end of 2003, the company said. No more than 160 of the 1,100 local employees will be laid off this year in the phase-out, the company said, citing competitive pressures, its old facilities and the company being locked into higher-cost domestic sugar with its government-backed support prices for growers.