Com Cutting!!!!
Of Course not. With a brushless system you just need to keep the motor clean of dirt, no brush's, com's, or springs to worry about anymore.
Cleaning the motor every 12 runs or so is still recommended to extend the life of the bearings in high dust/dirt situations, probably 25 runs for street running. Cleaning interval is a personal preference, some will clean parts very often, but some people will just run it until it quits with no maintenance ever done, then just replace it. The companies making the products that are constant wearing items just love that type of customer.
You will most likely still have to replace the bearings at some point in the life of the motor, but just like anything else mechanical, preventive maintenance is the key to a longer life cycle.