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/gdiimage.cpp

@@ -64,8 +64,6 @@ WX_DEFINE_LIST(wxGDIImageHandlerList)
 // private classes
 // ----------------------------------------------------------------------------
 
-#ifndef __WXMICROWIN__
-
 // all image handlers are declared/defined in this file because the outside
 // world doesn't have to know about them (but only about wxBITMAP_TYPE_XXX ids)
 
@@ -221,8 +219,6 @@ wxIMPLEMENT_DYNAMIC_CLASS(wxPNGResourceHandler, wxBitmapHandler);
 // private functions
 // ----------------------------------------------------------------------------
 
-#endif
-    // __MICROWIN__
 
 // ============================================================================
 // implementation
@@ -338,7 +334,6 @@ void wxGDIImage::CleanUpHandlers()
 
 void wxGDIImage::InitStandardHandlers()
 {
-#ifndef __WXMICROWIN__
     AddHandler(new wxBMPResourceHandler);
     AddHandler(new wxBMPFileHandler);
     AddHandler(new wxICOFileHandler);
@@ -346,11 +341,8 @@ void wxGDIImage::InitStandardHandlers()
 #if wxUSE_PNG_RESOURCE_HANDLER
     AddHandler(new wxPNGResourceHandler);
 #endif // wxUSE_PNG_RESOURCE_HANDLER
-#endif
 }
 
-#ifndef __WXMICROWIN__
-
 // ----------------------------------------------------------------------------
 // wxBitmap handlers
 // ----------------------------------------------------------------------------
@@ -688,5 +680,3 @@ wxSize wxGetHiconSize(HICON WXUNUSED_IN_WINCE(hicon))
 
     return size;
 }
-
-#endif // __WXMICROWIN__