There should be two pinch bolts on the non-drive crank arm that need to be loosened. Then there's a screw where the standard crank arm bolt would be, but on an outboard bearing setup this screw is just used to draw the non-drive side arm onto the BB spindle. Remove this screw and the non-drive side arm should slide off. Then you can use a rubber mallet to hit the spindle and drive the drive-side arm out of the bearings.