Remove deprecrated [rbac] config group

This PS removes the deprecated [rbac] config group. It was replaced
last release cycle with the [patrole] config group, which has
the exact same options. This is because [patrole] is more user-friendly
and congruent with the project name.

Change-Id: Id1a7af0445bd50f44ddcc4277f952391968726b8
8 files changed