Anton Hansson 305fb2fc1a 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

2020-02-19 16:37:42 +00:00

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midi

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