I would guess the shaved part is for balancing the crank and nothing to worry about, but guesswork isn't good enough. Check every place that crank can contact other metal everywhere with a flashlight and make sure. The engine looks clean inside.
I like to check the torque spec then tighten everything in site to that spec before buttoning it up. Just in case something got loose which is doubtful. I like to inspect the bottom of the pan to see what sort of crud has accumulated too. If its just dust mixed with oil you are good to go. Anything larger would be suspect.
