def DeleteGroup(r, group, dry_run=False):
    """
    Deletes a node group.

    @type group: str
    @param group: the node group to delete
    @type dry_run: bool
    @param dry_run: whether to peform a dry run

    @rtype: int
    @return: job id
    """
    query = {'dry-run': dry_run}
    return r.request('delete', '/2/groups/%s' % group, query=query)
