Revert "use fullrange by default for yuv420p if supported (#6655)" (#6656)

This reverts commit 80afa98d66.

src/flutter_ffi.rs

@@ -1416,15 +1416,6 @@ pub fn session_change_prefer_codec(session_id: SessionID) {
     }
 }
 
-pub fn session_is_codec_support_444(session_id: SessionID, codec: String) -> SyncReturn<bool> {
-    let res = if let Some(session) = sessions::get_session_by_session_id(&session_id) {
-        session.is_codec_support_444(codec)
-    } else {
-        false
-    };
-    SyncReturn(res)
-}
-
 pub fn session_on_waiting_for_image_dialog_show(session_id: SessionID) {
     super::flutter::session_on_waiting_for_image_dialog_show(session_id);
 }