fdo#72598 Remove SunStudio cruft from code base

Change-Id: I5150eec33228e18e274a8ae4effd3f185851b7f4
Reviewed-on: https://gerrit.libreoffice.org/7103
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>