rm selection_version

GUI/Model/Descriptor/PolyItem.h

@@ -135,7 +135,6 @@ template <typename C> void PolyItem<C>::writeItemTo(const BaseType* t, QXmlStrea
     XML::writeAttribute(w, XML::Attrib::type, typeIndex);
     // The next line allows to see the name of item type in XML. May be skipped while reading.
     XML::writeAttribute(w, XML::Attrib::name, C::uiInfo(C::type(t)).menuEntry);
-    XML::writeAttribute(w, XML::Attrib::selection_version, uint(1));
     if (t)
         t->writeTo(w);
 }
@@ -151,8 +150,6 @@ void PolyItem<C>::writeChosen(const BaseType* t, QXmlStreamWriter* w, const QStr
 template <typename C> template <typename... Args>
 C::BaseType* PolyItem<C>::readItemFrom(QXmlStreamReader* r, Args... args)
 {
-    const uint sel_ver = XML::readUInt(r, XML::Attrib::selection_version);
-    Q_UNUSED(sel_ver)
     const uint typeIndex = XML::readUInt(r, XML::Attrib::type);
     const auto type = static_cast<typename C::Type>(typeIndex);
     BaseType* t = C::create(type, args...);

GUI/Model/Util/UtilXML.h

@@ -36,7 +36,6 @@ const QString id("id");
 const QString index("index");
 const QString name("name");
 const QString projectName("projectName");
-const QString selection_version("selection_version");
 const QString type("type");
 const QString value("value");
 const QString xPos("xPos");