Hi,

Whilst working on the Reproducible Builds effort [0], we noticed that
microbiomeutil could not be built reproducibly.

This is because the tests clean up a number of files, so if the tests
are skipped (i.e. via "nocheck"), then the package will actually contain
these files instead.

Patch attached that moves the deletion of these files to part of
debian/rules that is executed unconditionally.

 [0] https://reproducible-builds.org/


Regards,