Remove the now-empty machine-specific attr structure
Remove the now-empty machine-specific attr structure

git-svn-id: 7b88ff42cb1e13ac5b391602c2e156d583301d0c@2161 4b44e086-7f34-40ce-a3bd-00e031736276

BlueBrain/hwloc,BlueBrain/hwloc,BlueBrain/hwloc,BlueBrain/hwloc