Remove PIC from comments

[nerdralph]

I guess a much older version of this code was written for a PIC.

https://github.com/WestfW/OptiLoader/blob/master/optiLoader.ino#L44

[WestfW]

Heh. I think that was a "think-o" on my part. The sketch is essentially the ArduinoISP sketch, with the source of data changed, and I added the "power from a pin" code and comments. I just didn't type it quite right :-)