Don't bother with the picture, most of us have already seen one or a picture onf one. Just take a disk grinder to the "tangs" and cut them off and blend the area into the crank.

I don't know why they are there, probably a remnant of the forging process that the factory engineers figured could be left on, saving a couple minutes of prep time per crank. Or else someone got the idea that they would sling oil onto the cam or whatever. Whatever the reason they are not necessary and can be removed.
R.