Remove out of date osx defines.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/SOC2011_WEBVIEW@68166 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/osx/webview_webkit.h

@@ -17,9 +17,6 @@
 
 #if wxUSE_WEBKIT && (defined(__WXMAC__) || defined(__WXCOCOA__))
 
-// TODO: define this in setup.h ?
-#define wxHAVE_WEB_BACKEND_OSX_WEBKIT 1
-
 #include "wx/control.h"
 #include "wx/webview.h"
 
@@ -132,11 +129,6 @@ private:
     //TODO: look into using DECLARE_WXCOCOA_OBJC_CLASS rather than this.
 };
 
-
-#else
-// TODO: define this in setup.h ?
-#define wxHAVE_WEB_BACKEND_OSX_WEBKIT 0
-
 #endif // wxUSE_WEBKIT
 
 #endif // _WX_WEBKIT_H_