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

tests/benchmarks/htmlparser/htmlpars.cpp

@@ -28,10 +28,6 @@
 #include "wx/html/htmldefs.h"
 #include "wx/arrimpl.cpp"
 
-#ifdef __WXWINCE__
-    #include "wx/msw/wince/missing.h"       // for bsearch()
-#endif
-
 // DLL options compatibility check:
 WX_CHECK_BUILD_OPTIONS("wxHTML")
 
@@ -846,23 +842,10 @@ wxChar wx28HtmlEntitiesParser::GetEntityChar(const wxString& entity)
                 substitutions_cnt++;
 
         wx28HtmlEntityInfo *info = NULL;
-#ifdef __WXWINCE__
-        // bsearch crashes under WinCE for some reason
-        size_t i;
-        for (i = 0; i < substitutions_cnt; i++)
-        {
-            if (entity == substitutions[i].name)
-            {
-                info = & substitutions[i];
-                break;
-            }
-        }
-#else
         info = (wx28HtmlEntityInfo*) bsearch(entity.c_str(), substitutions,
                                            substitutions_cnt,
                                            sizeof(wx28HtmlEntityInfo),
                                            wx28HtmlEntityCompare);
-#endif
         if (info)
             code = info->code;
     }