Clean up imports

src/models/generic.rs

@@ -6,11 +6,13 @@ pub struct GenericResponse {
 }
 
 impl GenericResponse {
+    #[cfg(engine)]
     pub fn ok() -> Self {
         GenericResponse {
             status: String::new(),
         }
     }
+    #[cfg(engine)]
     pub fn err(msg: &str) -> Self {
         GenericResponse {
             status: msg.to_string(),