Remove Windows CE support

Windows CE doesn't seem to be supported by Microsoft any longer. Last CE
release was in early 2013 and the PocketPC and Smartphone targets supported by
wxWidgets are long gone.

The build files where already removed in an earlier cleanup this commit
removes all files, every #ifdef and all documentation regarding the Windows CE
support.

Closes https://github.com/wxWidgets/wxWidgets/pull/81

src/common/file.cpp

@@ -23,7 +23,7 @@
 #if wxUSE_FILE
 
 // standard
-#if defined(__WINDOWS__) && !defined(__GNUWIN32__) && !defined(__WXWINCE__)
+#if defined(__WINDOWS__) && !defined(__GNUWIN32__)
 
 #define   WIN32_LEAN_AND_MEAN
 #define   NOSERVICE
@@ -46,8 +46,6 @@
 #define   NOCRYPT
 #define   NOMCX
 
-#elif defined(__WINDOWS__) && defined(__WXWINCE__)
-    #include  "wx/msw/missing.h"
 #elif (defined(__UNIX__) || defined(__GNUWIN32__))
     #include  <unistd.h>
     #include  <time.h>
@@ -81,9 +79,7 @@
 
 #include  <stdio.h>       // SEEK_xxx constants
 
-#ifndef __WXWINCE__
-    #include <errno.h>
-#endif
+#include <errno.h>
 
 // Windows compilers don't have these constants
 #ifndef W_OK
@@ -114,10 +110,6 @@
     #define   O_BINARY    (0)
 #endif  //__UNIX__
 
-#ifdef __WXWINCE__
-    #include "wx/msw/private.h"
-#endif
-
 // ============================================================================
 // implementation of wxFile
 // ============================================================================
@@ -175,13 +167,7 @@ bool wxFile::CheckForError(wxFileOffset rc) const
     if ( rc != -1 )
         return false;
 
-    const_cast<wxFile *>(this)->m_lasterror =
-#ifndef __WXWINCE__
-                                                errno
-#else
-                                                ::GetLastError()
-#endif
-                                                ;
+    const_cast<wxFile *>(this)->m_lasterror = errno;
 
     return true;
 }