fdo#72598 Remove SunStudio cruft from code base

Change-Id: I6f75d0df0ddafc892fef0ce1bfdcdd6c70151afc
Reviewed-on: https://gerrit.libreoffice.org/7104
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>