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

include/wx/msw/menu.h

@@ -20,24 +20,8 @@
 
 class WXDLLIMPEXP_FWD_CORE wxFrame;
 
-#if defined(__WXWINCE__) && wxUSE_TOOLBAR
-class WXDLLIMPEXP_FWD_CORE wxToolBar;
-#endif
-
 class wxMenuRadioItemsData;
 
-// Not using a combined wxToolBar/wxMenuBar? then use
-// a commandbar in WinCE .NET to implement the
-// menubar, since there is no ::SetMenu function.
-#if defined(__WXWINCE__)
-#   if ((_WIN32_WCE >= 400) && !defined(__POCKETPC__) && !defined(__SMARTPHONE__)) || \
-        defined(__HANDHELDPC__)
-#       define WINCE_WITH_COMMANDBAR
-#   else
-#       define WINCE_WITHOUT_COMMANDBAR
-#   endif
-#endif
-
 
 #include "wx/arrstr.h"
 
@@ -208,17 +192,6 @@ public:
     virtual void Detach();
     virtual void Attach(wxFrame *frame);
 
-#if defined(__WXWINCE__) && wxUSE_TOOLBAR
-    // Under WinCE, a menubar is owned by the frame's toolbar
-    void SetToolBar(wxToolBar* toolBar) { m_toolBar = toolBar; }
-    wxToolBar* GetToolBar() const { return m_toolBar; }
-#endif
-
-#ifdef WINCE_WITH_COMMANDBAR
-    WXHWND GetCommandBar() const { return m_commandBar; }
-    bool AddAdornments(long style);
-#endif
-
 #if wxUSE_ACCEL
     // update the accel table (must be called after adding/deleting a menu)
     void RebuildAccelTable();
@@ -251,15 +224,6 @@ protected:
     // the wxWidgets position.
     int MSWPositionForWxMenu(wxMenu *menu, int wxpos);
 
-#if defined(__WXWINCE__) && wxUSE_TOOLBAR
-    wxToolBar*  m_toolBar;
-#endif
-
-#ifdef WINCE_WITH_COMMANDBAR
-    WXHWND      m_commandBar;
-    bool        m_adornmentsAdded;
-#endif
-
 private:
     wxDECLARE_DYNAMIC_CLASS_NO_COPY(wxMenuBar);
 };