fdo#72598 Remove SunStudio cruft from code base

Change-Id: I8dfbbb36cca3cf71c8d347b248dd206c447db6d2
Reviewed-on: https://gerrit.libreoffice.org/7136
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>