diff --git a/tonic/src/transport/service/tls.rs b/tonic/src/transport/service/tls.rs
index 4ec143589..fc3aa8454 100644
--- a/tonic/src/transport/service/tls.rs
+++ b/tonic/src/transport/service/tls.rs
@@ -2,11 +2,7 @@ use std::{fmt, sync::Arc};
 
 use tokio::io::{AsyncRead, AsyncWrite};
 use tokio_rustls::{
-    rustls::{
-        pki_types::{CertificateDer, PrivateKeyDer, ServerName},
-        server::WebPkiClientVerifier,
-        ClientConfig, RootCertStore, ServerConfig,
-    },
+    rustls::{pki_types::ServerName, ClientConfig, RootCertStore, ServerConfig},
     TlsAcceptor as RustlsAcceptor, TlsConnector as RustlsConnector,
 };