QNAM: Fix my silly leftover mistake

I removed the line locally, and then added it back for testing and
forgot to remove it again.

Amends a0bfa4e1f8.

Task-number: QTBUG-84907
Change-Id: I7d6d0237742f4c3fc3ca0a2532d776325f396aab
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>

src/network/access/qnetworkaccessmanager_p.h

@@ -164,7 +164,6 @@ public:
     QScopedPointer<QHstsStore> stsStore;
 #endif // QT_CONFIG(settings)
     bool stsEnabled = false;
-    mutable QNetworkStatusMonitor statusMonitor;
 
     bool autoDeleteReplies = false;