Revert "Merge pull request #4626 from pavltom/GUI_TreeView_Item_Ordering"

This reverts commit c62239d0ba, reversing
changes made to bef1df4d40.

See forums discussion: https://forum.freecadweb.org/viewtopic.php?p=549120

src/Mod/PartDesign/Gui/ViewProviderLoft.h

@@ -44,9 +44,7 @@ public:
 
     virtual bool onDelete(const std::vector<std::string> &);
     void highlightReferences(const bool on, bool auxiliary);
-
-    virtual bool allowTreeOrderSwap(const App::DocumentObject *, const App::DocumentObject *) const { return false; }
-
+    
 protected:
     virtual bool setEdit(int ModNum);
     virtual void unsetEdit(int ModNum);

src/Mod/PartDesign/Gui/ViewProviderPipe.h

@@ -52,9 +52,7 @@ public:
 
     virtual bool onDelete(const std::vector<std::string> &);
     void highlightReferences(Reference mode, bool on);
-
-    virtual bool allowTreeOrderSwap(const App::DocumentObject *, const App::DocumentObject *) const { return false; }
-
+    
 protected:
     virtual QIcon getIcon(void) const;
     virtual bool setEdit(int ModNum);