Some of those were duplicate, so remove those.  In order to better see
such things in the future, sort them so they are "regular, italic,
bold, bold-italic, light, light-italic".
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

The original libvirt logo was built using what appears to be
either Overpass font, or one stylistically very similar (the
slanted top of letters like 'l', 't', etc). The newly recreated
libvirt logo will use Overpass. Use this font for the website
text too, to provide a consistent style.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>