You can remove the peels if you really want to, just keep in mind that a traditional Brazilian Lemonade will have the peels on. It's known to be slightly bitter because of the peels. If you do choose to remove the peels, you'll remove most of the bitterness. Especially if you aren't familiar with this drink then it could be a surprising taste. You can even choose to remove half the peels from the lime wedges, but leave the rest of the peels on the second half to get just the right amount of bitterness for your preference, feel free to play with it.