Compile fix with recent Qt dev

The reasoning in 1b4766e26c did not take into account that the scope
of QT_NO_JAVA_STYLE_ITERATORS may change over time, as done with
f70905448f6 in Qt base.

Change-Id: Ib1966ff26c4d36d5f62e149d6b45baa4aecf825d
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/libs/qmljs/qmljsmodelmanagerinterface.h

@@ -132,7 +132,6 @@ public:
     };
 
     typedef QHash<QString, CppData> CppDataHash;
-    typedef QHashIterator<QString, CppData> CppDataHashIterator;
 
 public:
     ModelManagerInterface(QObject *parent = nullptr);