fixed wxScrolledWindow best size calculation: compute something (this was broken after 2.8) and don't use current size in computation; also removed now-unused ScrollGetWindowSizeForVirtualSize() method to simplify the code

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@50877 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/window.h

@@ -1518,14 +1518,6 @@ protected:
     // same size as it would have after a call to Fit()
     virtual wxSize DoGetBestSize() const;
 
-    // called from DoGetBestSize() to convert best virtual size (returned by
-    // the window sizer) to the best size for the window itself; this is
-    // overridden at wxScrolledWindow level to clump down virtual size to real
-    virtual wxSize GetWindowSizeForVirtualSize(const wxSize& size) const
-    {
-        return size;
-    }
-
     // this is the virtual function to be overriden in any derived class which
     // wants to change how SetSize() or Move() works - it is called by all
     // versions of these functions in the base class