I don't think so. If the 8.8 is anything like the 9" those tubes are a good 1/4" thick so a little divet like those shouldn't compromise their strength. If it concerns you just fill it with weld.... but do it with stitches not one continuous weld. Take your time and don't overheat the tube or it could distort. However, my guess is you don't need to do that.
Here's a pic of a 9" I narrowed for my deuce. At this point it's tacked together but you can see by the bevels how thick those axle tube really are.
"It is not always possible to be the best, but it is always possible to improve your own performance. " - Jackie Stewart