Remove group members
If you are in the group details, to which you have access by clicking on the group name in the left hand menu panel.
You may now hover your mouse over the Members button that is located in the upper right of the screen, which will show you the complete list of members. Hover your mouse over the member you wish to remove, the remove icon should appear next to his name, click on it and you are done.
info_outline Note that admins can also remove a member from a group via person details.