Remove MicroWindows support.

MicroWindows (aka Nano-X) support hasn’t been updated since 2010 and last work for it in wxWidgets happened more than 10 years ago.

src/msw/cursor.cpp

@@ -39,12 +39,6 @@
 #include "wx/msw/private.h"
 #include "wx/msw/missing.h" // IDC_HAND
 
-// define functions missing in MicroWin
-#ifdef __WXMICROWIN__
-    static inline void DestroyCursor(HCURSOR) { }
-    static inline void SetCursor(HCURSOR) { }
-#endif // __WXMICROWIN__
-
 // ----------------------------------------------------------------------------
 // private classes
 // ----------------------------------------------------------------------------
@@ -217,15 +211,6 @@ wxCursor::wxCursor(const wxImage& image)
 }
 #endif // wxUSE_IMAGE
 
-// MicroWin doesn't have support needed for the other ctors
-#ifdef __WXMICROWIN__
-
-wxCursor::InitFromStock(wxStockCursor WXUNUSED(cursor_type))
-{
-}
-
-#else // !__WXMICROWIN__
-
 wxCursor::wxCursor(const wxString& filename,
                    wxBitmapType kind,
                    int hotSpotX,
@@ -411,8 +396,6 @@ void wxCursor::InitFromStock(wxStockCursor idCursor)
     }
 }
 
-#endif // __WXMICROWIN__/!__WXMICROWIN__
-
 wxCursor::~wxCursor()
 {
 }