Use QtClipboard image functions instead of setting mime type

include/wx/qt/dataobj2.h

@@ -8,28 +8,15 @@
 #ifndef _WX_QT_DATAOBJ2_H_
 #define _WX_QT_DATAOBJ2_H_
 
-#include <wx/scopedptr.h>
-
-class QByteArray;
-
 class WXDLLIMPEXP_CORE wxBitmapDataObject : public wxBitmapDataObjectBase
 {
 public:
     wxBitmapDataObject();
     wxBitmapDataObject(const wxBitmap& bitmap);
 
-    ~wxBitmapDataObject();
-
-    void SetBitmap(const wxBitmap& bitmap) wxOVERRIDE;
-    size_t GetDataSize() const wxOVERRIDE;
-    bool GetDataHere(void *buf) const wxOVERRIDE;
-    bool SetData(const wxDataFormat& format, size_t len, const void *buf) wxOVERRIDE;
-
 protected:
-    void DoConvertToPng();
 
 private:
-    wxScopedPtr<QByteArray> m_imageBytes;
 };