qml: compile fix with namespaces

src/plugins/qmlprojectmanager/fileformat/filefilteritems.h

@@ -104,11 +104,9 @@ public:
 
 } // namespace QmlProjectManager
 
-QT_BEGIN_NAMESPACE
 QML_DECLARE_TYPE(QmlProjectManager::QmlFileFilterItem)
 QML_DECLARE_TYPE(QmlProjectManager::JsFileFilterItem)
 QML_DECLARE_TYPE(QmlProjectManager::ImageFileFilterItem)
 QML_DECLARE_TYPE(QmlProjectManager::CssFileFilterItem)
-QT_END_NAMESPACE
 
 #endif // FILEFILTERITEMS_HPROJECTITEM_H

src/plugins/qmlprojectmanager/fileformat/qmlprojectitem.h

@@ -53,10 +53,8 @@ protected:
 
 } // namespace QmlProjectManager
 
-QT_BEGIN_NAMESPACE
 QML_DECLARE_TYPE(QmlProjectManager::QmlProjectItem);
 QML_DECLARE_TYPE(QmlProjectManager::QmlProjectContentItem);
-QT_END_NAMESPACE
 Q_DECLARE_METATYPE(QList<QmlProjectManager::QmlProjectContentItem *>);