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/univ/framuniv.cpp

@@ -301,9 +301,5 @@ bool wxFrame::Enable(bool enable)
 {
     if (!wxFrameBase::Enable(enable))
         return false;
-#ifdef __WXMICROWIN__
-    if (m_frameMenuBar)
-        m_frameMenuBar->Enable(enable);
-#endif
     return true;
 }

src/univ/scrolbar.cpp

@@ -43,7 +43,7 @@
     #define WXDEBUG_SCROLLBAR
 #endif
 
-#if defined(WXDEBUG_SCROLLBAR) && defined(__WXMSW__) && !defined(__WXMICROWIN__)
+#if defined(WXDEBUG_SCROLLBAR) && defined(__WXMSW__)
 #include "wx/msw/private.h"
 #endif
 
@@ -627,7 +627,7 @@ void wxScrollBar::UpdateThumb()
             dc.DrawRectangle(rect);
 
             // under Unix we use "--sync" X option for this
-            #if defined(__WXMSW__) && !defined(__WXMICROWIN__)
+            #if defined(__WXMSW__)
                 ::GdiFlush();
                 ::Sleep(200);
             #endif // __WXMSW__

src/univ/winuniv.cpp

@@ -51,7 +51,7 @@
     #define WXDEBUG_REFRESH
 #endif
 
-#if defined(WXDEBUG_REFRESH) && defined(__WXMSW__) && !defined(__WXMICROWIN__)
+#if defined(WXDEBUG_REFRESH) && defined(__WXMSW__)
 #include "wx/msw/private.h"
 #endif
 
@@ -477,7 +477,7 @@ void wxWindow::Refresh(bool eraseBackground, const wxRect *rect)
         dc.DrawRectangle(rectWin);
 
         // under Unix we use "--sync" X option for this
-        #if defined(__WXMSW__) && !defined(__WXMICROWIN__)
+        #if defined(__WXMSW__)
             ::GdiFlush();
             ::Sleep(200);
         #endif // __WXMSW__