Code review comment for lp:~nuclearbob/utah/media-info-mini

The get_media_info function tries to open /var/log/installer/media-info, and if it doesn't open that file, it leaves media_info as None. The platform.machine call in get_arch is working fine. We had get_arch defined two different ways, which was picked up by static analysis, so I deleted the first one, since the second one is what's getting used and working fine.