tree d5557a18af8f71db0ce46443fee9aa8fda4ad8a8
parent 5562c7e87f564661908fcb2f59591d012626ee3b
author Anton Hansson <hansson@google.com> 1582126078 +0000
committer Anton Hansson <hansson@google.com> 1582130262 +0000

Remove obsolete subdirs and optional_subdirs

I was looking for documentation of what these mean, but discovered
that these attributes have been obsolete for years.

Test: m
Change-Id: Ifcf47e99d22b1546780968d1030f835173612a27