remove comment about actors feature

src/test.rs

@@ -1277,11 +1277,10 @@ mod tests {
         async fn actor_handler(
             addr: Data<Addr<MyActor>>,
         ) -> Result<impl Responder, Error> {
-            // `?` operator tests "actors" feature flag on actix-http
             let res = addr
                 .send(Num(1))
                 .await
-                .map_err(|e| crate::error::ErrorInternalServerError(e))?;
+                .map_err(crate::error::ErrorInternalServerError)?;
 
             if res == 1 {
                 Ok(HttpResponse::Ok())