dmi: remove the printInfo function

according to 'git grep' is never called.
make check passes cleanly.

Change-Id: I1dd9607b3b60fcbc3504383765fbf0937bbebc97
Signed-off-by: Francesco Romani <fromani@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/26813
Reviewed-by: mooli tayer <mtayer@redhat.com>
Reviewed-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>