Please remove files/entries with 0 bytes.

Since the last Hobbes update, when a file is replaced, the old "registry" remains available on the web site like 0 Bytes.
Please check: 
- https://hobbes.nmsu.edu/?path=%2Fpub%2Fos2%2Fsystem
- https://hobbes.nmsu.edu/?path=%2Fpub%2Fos2%2Fsystem%2Fdrivers
- https://hobbes.nmsu.edu/?path=%2Fpub%2Fos2%2Futil%2Fwps