Fix an unfulfilled lint expectation on OSDK unit tests

osdk/src/config/manifest.rs

@@ -32,7 +32,7 @@ pub enum ProjectType {
 /// The osdk manifest from configuration file `OSDK.toml`.
 #[derive(Debug, Clone)]
 pub struct TomlManifest {
-    #[expect(dead_code)]
+    #[cfg_attr(not(test), expect(dead_code))]
     pub project_type: Option<ProjectType>,
     pub default_scheme: Scheme,
     pub map: HashMap<String, Scheme>,