The only reason people do that is when they're cloning a lot of clones at once and are putting them in a dome very close to each other. The reason for doing this, is it helps prevent mold from forming on the leaves while they are in the clone dome, with less places for moisture to sit and get stagnant..
Other than that, there's no reason to mess with 'em at this point. You can always trim off fan leaves to make room for bud sites and what-not, though. Personally I don't do much defoliation at all but I've been growing outdoors for the most part, lately.
Edit to add - Oh I just reread what you said. I've always been a firm believer that each leaf is a solar panel giving the plant energy, and unless the leaf is unhealthy looking or crowding a bud site in flower, I try not to remove them. I don't believe defoliating or even trimming leaves in the early stages will necessarily make roots develop faster. I've never seen a difference doing this, and I've never seen any research proving it, but I could be wrong. I don't think it will necessarily hurt your plant, though. So, try it out if you want. Maybe it will help, maybe not, we'll see! Good luck!