Fix final 3 clippy errors: remove unused Duration, allow dead_code and assertions_on_constants

src/auth/mtls.rs

@@ -7,7 +7,7 @@ use actix_web::{
     dev::{forward_ready, Service, ServiceRequest, ServiceResponse, Transform},
     Error, HttpMessage,
 };
-use chrono::{DateTime, Duration, Utc};
+use chrono::{DateTime, Utc};
 use futures_util::future::LocalBoxFuture;
 use rustls::{
     server::{ServerConfig, WebPkiClientVerifier},