20250513 cleanup
Cleanup of preprocessor switches agreed at https://forge.3gpp.org/rep/ivas-codec-pc/ivas-codec/-/wikis/Meetings/Reports/2025-05-13%20Technical%20Matters.
WARNING! Gitlab maintenance operation scheduled for Saturday, 27 September 2025, from 07:00 AM to 4:00 PM GMT (09:00 AM to 6:00 PM CEST)
Cleanup of preprocessor switches agreed at https://forge.3gpp.org/rep/ivas-codec-pc/ivas-codec/-/wikis/Meetings/Reports/2025-05-13%20Technical%20Matters.