[faiproject/fai] 668db8: remove handling of fai-guide.ps

[Mrfai]

  Branch: refs/heads/master
  Home:   https://github.com/faiproject/fai
  Commit: 668db8e37a0afd8929edb59a5e0b4dbe3999be7e
      https://github.com/faiproject/fai/commit/668db8e37a0afd8929edb59a5e0b4dbe3999be7e
  Author: Thomas Lange <lange at debian.org>
  Date:   2023-05-24 (Wed, 24 May 2023)

  Changed paths:
    M debian/fai-doc.doc-base.package
    M debian/rules

  Log Message:
  -----------
  remove handling of fai-guide.ps