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.
Cleanup of preprocessor switches agreed at https://forge.3gpp.org/rep/ivas-codec-pc/ivas-codec/-/wikis/Meetings/Reports/2025-05-13%20Technical%20Matters.