Remove unnecessary namespacing

src/routes.rs

 pub async fn delete_post(req: Request<()>) -> Result {
     let id: String = req.param("id")?;
     fs::delete_post(id)?;
-    let mut res = Response::new(tide::StatusCode::Ok);
+    let mut res = Response::new(StatusCode::Ok);
     res.set_body("{\"success\": \"true\"}");
     res.set_content_type(mime::JSON);
     Ok(res)