qinisettings: code clean up

src/qinisettings.h

@@ -35,6 +35,7 @@
 
 class QIniSettings : public QSettings {
   Q_OBJECT
+  Q_DISABLE_COPY (QIniSettings)
 
 public:
   QIniSettings(const QString &organization, const QString &application = QString(), QObject *parent = 0 ):
@@ -51,12 +52,6 @@ public:
 
   }
 
-  QIniSettings& operator =(const QIniSettings &other) {
-    Q_UNUSED(other);
-    Q_ASSERT(0);
-    return *this;
-  }
-
 #ifdef Q_WS_WIN
   QVariant value(const QString & key, const QVariant &defaultValue = QVariant()) const {
     QString key_tmp(key);