UX: remove alarming warning

After upgrading from 3.1 users was warned about a legacy config
still present in conf files if the user forgot to update .conf file
with the one provided by the package as .rpmnew.
The tool is able to use the legacy configuration so no need to
alarm the user about that.

Change-Id: I18e6b0573164aa8f3c96308859018591289cd7d2
Bug-Url: https://bugzilla.redhat.com/1031094
Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>