This depends on which version you're using. If you're on 3.1.x, you can easily pick and choose which of the groups are displayed on the team page. In that case, do the following:
ACP -> Users & Groups -> Manage groups -> Choose group: Settings -> Display on Group page: No
Also, in the future, please create a new topic in the appropriate forum when you have a question like this. We prefer to have each question in the separate topic where you can describe your situation. Then we won't run into trouble like having to guess what your board version is.