QNetworkAccessCache: Remove the ctor and init member variables in class

Change-Id: Ic7ce41679d89b496413ef13e6e917bf506b2405d
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>

src/network/access/qnetworkaccesscache.cpp

@@ -102,11 +102,6 @@ void QNetworkAccessCache::CacheableObject::setShareable(bool enable)
     shareable = enable;
 }
 
-QNetworkAccessCache::QNetworkAccessCache()
-    : firstExpiringNode(nullptr), lastExpiringNode(nullptr)
-{
-}
-
 QNetworkAccessCache::~QNetworkAccessCache()
 {
     clear();

src/network/access/qnetworkaccesscache_p.h

@@ -91,7 +91,6 @@ public:
         void setShareable(bool enable);
     };
 
-    QNetworkAccessCache();
     ~QNetworkAccessCache();
 
     void clear();
@@ -111,8 +110,8 @@ protected:
 private:
     // idea copied from qcache.h
     NodeHash hash;
-    Node *firstExpiringNode;
-    Node *lastExpiringNode;
+    Node *firstExpiringNode = nullptr;
+    Node *lastExpiringNode = nullptr;
 
     QBasicTimer timer;