Remove wxDataViewTextRendererAttr by merging it with wxDataViewTextRenderer.

There is no reason to have a separate class for rendering the text honouring
the attributes defined for it, wxDataViewTextRenderer itself already does this
perfectly well.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62383 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/dataview.h

@@ -144,6 +144,7 @@ public:
     bool HasColour() const { return m_colour.Ok(); }
     const wxColour& GetColour() const { return m_colour; }
 
+    bool HasFont() const { return m_bold || m_italic; }
     bool GetBold() const { return m_bold; }
     bool GetItalic() const { return m_italic; }
 
@@ -983,6 +984,10 @@ private:
 
 #endif
 
+// this class is obsolete, its functionality was merged in
+// wxDataViewTextRenderer itself now, don't use it any more
+#define wxDataViewTextRendererAttr wxDataViewTextRenderer
+
 //-----------------------------------------------------------------------------
 // wxDataViewListStore
 //-----------------------------------------------------------------------------