Remove obsolete MSVC version tests.

Don't compare __VISUALC__ with versions 1200 (VC6) and earlier, such tests are
always true or always false now that we don't support VC6 any more, so just
remove them simplifying the code.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76548 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/window.h

@@ -33,9 +33,6 @@ class WXDLLIMPEXP_CORE wxWindowMSW : public wxWindowBase
     friend class wxSpinCtrl;
     friend class wxSlider;
     friend class wxRadioBox;
-#if defined __VISUALC__ && __VISUALC__ <= 1200
-    friend class wxWindowMSW;
-#endif
 public:
     wxWindowMSW() { Init(); }