revert work in progress

Change-Id: I1387b0ed7b2d8bb9df801c03cf59efc9c0e1cfd3

include/vcl/outdev.hxx

@@ -235,7 +235,6 @@ class VCLXGraphics;
 class OutDevStateStack;
 
 typedef boost::intrusive_ptr< FontCharMap > FontCharMapPtr;
-typedef struct _cairo cairo_t;
 
 namespace vcl {
     class FontInfo;
@@ -378,9 +377,6 @@ public:
 
     SystemGraphicsData          GetSystemGfxData() const;
     bool                        SupportsCairo() const;
-    bool                        CanResizeCairoSurface() const;
-    cairo_t*                    GetCairoContext() const;
-    void                        FlushCairoContext(cairo_t *cr) const;
     css::uno::Any               GetSystemGfxDataAny() const;
 
     void                        SetRefPoint();