well brother as you said its done now so you cant really do anything I am afraid, just be careful, drive safe and try to inspect the calipers in regular intervals.
also let me tell you something more when we need to minimize the effect of stress concentration points (sharp edges and sharp angles) we make them smooth, so for drilled holes it is recommended to bevel the edges to round them off i cant really recall what that operation is called right now. but I think you should leave them as they are.
and please for God's sake don't blindly do anything those mechanics say, always do research first and then do whatever you like.