great copy ctor/assignment operators cleanup by Paul Cornett (patch 1307665)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@37402 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/colour.h

@@ -53,12 +53,6 @@ public:
     wxColour( const wxChar *colourName ) { InitFromName( wxString(colourName) ); }
 #endif
 
-
-    wxColour( const wxColour& col )
-        : wxGDIObject()
-        { Ref(col); }
-    wxColour& operator = ( const wxColour& col ) { Ref(col); return *this; }
-
     ~wxColour();
 
     bool Ok() const { return m_refData != NULL; }