The pivot for the lever is held in place by the same bolt that holds the lever to the handlebar. The screw has no function except to hold the suicide lever on. Unless you can salvage an old non-suicide pair of levers and use the pivot from them you can just cut off the protruding part flush and remove the burrs. If you want to get fancier you can disassemble the lever after marking the cut and smooth it off better, or even paint the end.