Revert "Fixed memory leaks"

This reverts commit a9efbf4716.

The commit broke compiles with scripting

bitmap2component/bitmap2cmp_gui.cpp

@@ -79,7 +79,7 @@ private:
     wxString        m_ConvertedFileName;
     wxSize          m_frameSize;
     wxPoint         m_framePos;
-    std::unique_ptr<wxConfigBase> m_config;
+    wxConfigBase*   m_config;
 
 public:
     BM2CMP_FRAME( KIWAY* aKiway, wxWindow* aParent );
@@ -223,6 +223,8 @@ BM2CMP_FRAME::~BM2CMP_FRAME()
     m_config->Write( KEYWORD_LAST_FORMAT,  m_radioBoxFormat->GetSelection() );
     m_config->Write( KEYWORD_LAST_MODLAYER,  m_radio_PCBLayer->GetSelection() );
 
+    delete m_config;
+
     /* This needed for OSX: avoids further OnDraw processing after this
      * destructor and before the native window is destroyed
      */