Remove legacy testing of systems that always have an os-release file
Remove legacy testing of systems that always have an os-release file

These are modern operating systems that will always use the new os-release logic:

Fedora, Arch, Linux Mint, raspbian, amazon 2, clearos

Signed-off-by: Tim Smith <764ef62106582a09ed09dfa0b6bff7c05fd7d1e4@chef.io>

chef/ohai,mattray/ohai,chef/ohai,jaymzh/ohai,jaymzh/ohai,higanworks/ohai,higanworks/ohai,mattray/ohai