Remove unused properties of ResourceDispatcherHostLoginDelegateQt

Change-Id: I1e4108d0730bf73592bc9472e81e919fb14c5c6c
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

src/core/renderer_host/resource_dispatcher_host_delegate_qt.h

@@ -68,11 +68,6 @@ private:
     void triggerDialog();
     void destroy();
 
-    QUrl m_url;
-    QString m_realm;
-    bool m_isProxy;
-    QString m_host;
-
     int m_renderProcessId;
     int m_renderFrameId;