You can, but there is a reason they are added (I suppose the devs added them?).
Some of them are adding convenience (not requiring sudo for features like mount/write external storage, viewing system logs, etc).
Others are of the same kind, although added for future possible needs, like using specific old applications that use such groups to provide security or other features to normal users.
Apart from the feeling that your system/account is clean, what can be the benefit of removing those, especially when you don’t know how to administer your system like an expert (as most of us were in the beginning of our Linux experience)?