Remove the screws from the door hinges on the cabinet you are going to remove using a drill and screwdriver bit.
Locate the screws on the sides of the cabinet on the inside and remove them using the drill and screwdriver bit. You will find the screws at the top and bottom and there will possibly be some securing the cabinet to the wall at the back.
Remove any molding from the front of the cabinet using the claw end of a hammer. Slide the cabinet section out of the bay.