fix clippy errors

Author: ChristianPavilonis

crates/fastly/src/main.rs

@@ -144,7 +144,7 @@ async fn route_request(settings: Settings, req: Request) -> Result<Response, Err
     };
 
     // Convert any errors to HTTP error responses
-    let mut response = result.map_or_else(|e| to_error_response(e), |r| r);
+    let mut response = result.unwrap_or_else(to_error_response);
 
     // Add X-Robots-Tag header to prevent crawlers and indexers
     response.set_header("X-Robots-Tag", "noindex, nofollow");