[fixup] remove unused imports

Author: alexrudy

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,
 };