Removes a member from an arena team
Signature:
ArenaTeamUninviteByName(team, "name")
Arguments:
team- Index of one of the player's arena teams (number, arenaTeamID)name- Name of a team member to remove (string)
This function does not prompt the user for confirmation before its results take effect -- that behavior is provided by the default UI, and this function is called from the confirmation dialog