Natty Boh said goodbye to Maryland years ago. Now production of Guinness’s Baltimore Blonde is also leaving the state. Diageo North America, Inc., the parent company for Guinness, filed notice that it will lay off 108 workers and shut down its plant in Relay in a work adjustment and retraining log submitted with the state. However, a spokeswoman for Guinness said around 97 roles would be impacted.