Removing obsolete conf directory

This directory was replaced by files/conf directory, but never removed.

[GF-2922] luna-sysservice has duplicate conf directories

Change-Id: I1f864a2ab98041f329d131cca51777d7ae339d70
Open-webOS-DCO-1.0-Signed-off-by: Daniel Gunn <daniel.gunn@lge.com>