Remove redundant 3-SHAKE mitigation.

net/socket/ssl_client_socket_impl.h

Index: net/socket/ssl_client_socket_impl.h
diff --git a/net/socket/ssl_client_socket_impl.h b/net/socket/ssl_client_socket_impl.h
index 86505ab2f4a80c3d8620bf3684b999603bf1bcf8..4e2db08d78b7c15224ec21402e89595d329b949b 100644
--- a/net/socket/ssl_client_socket_impl.h
+++ b/net/socket/ssl_client_socket_impl.h
@@ -154,7 +154,6 @@ class SSLClientSocketImpl : public SSLClientSocket,
   int DoVerifyCert(int result);
   int DoVerifyCertComplete(int result);
   void DoConnectCallback(int result);
-  void UpdateServerCert();
 
   void OnHandshakeIOComplete(int result);
 
@@ -272,7 +271,6 @@ class SSLClientSocketImpl : public SSLClientSocket,
   OpenSSLErrorInfo pending_read_error_info_;
 
   // Set when Connect finishes.
-  std::unique_ptr<PeerCertificateChain> server_cert_chain_;
   scoped_refptr<X509Certificate> server_cert_;
   CertVerifyResult server_cert_verify_result_;
   bool completed_connect_;