After working both sides a bit, you should be able to grab the lip of the outer race with a pair of small vise grips....wiggle it back and forth...if you cut the race correctly it should pop right out.
Race is out, you can see that the high speed grinder split the race allowing it to be removed
Here's the finished shaft, all cleaned up and ready for a new roller bearing
Race is out, you can see that the high speed grinder split the race allowing it to be removed