Saw most of it off and then one pass to clean up the edge, its only 1/4×1/2 so can be sawn in a few secs
If you prefer making swarf them hold it at the side of the vice so it is 1/4" high, 1/2" front to back. Use the side of a reasonable dia cutter and take 1/8" off at a time. speed will depend on cutter dia and type but fast as the machine will allow.
Edited By JasonB on 14/01/2018 19:26:41