[LU-4052] Minor autogen.sh simplification

• Type: Technical task
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.6.0
• Assignee: Minh Diep
• Reporter: Christopher Morrone (Inactive)

Description

The concept of conditional subdirectories dates back to the days when we had Lustre spread across multiple CVS repositories. For years now we have used git, and the tree is entirely available at all times.

Therefore we can simplify autogen.sh a bit more.