Schannel: Don't emit error when peer performs graceful disconnection

Pick-to: 6.5 6.4
Change-Id: Ie19a31fc61223d954badc704324adf4f5f7d361e
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>

src/plugins/tls/schannel/qtls_schannel.cpp

@@ -1656,8 +1656,6 @@ void TlsCryptographSchannel::transmit()
         } else if (status == SEC_I_CONTEXT_EXPIRED) {
             // 'remote' has initiated a shutdown
             disconnectFromHost();
-            setErrorAndEmit(d, QAbstractSocket::RemoteHostClosedError,
-                            schannelErrorToString(status));
             break;
         } else if (status == SEC_I_RENEGOTIATE) {
             // 'remote' wants to renegotiate