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/msw/notebook.cpp

@@ -55,12 +55,7 @@
 // you can set USE_NOTEBOOK_ANTIFLICKER to 0 for desktop Windows versions too
 // to disable code whih results in flicker-less notebook redrawing at the
 // expense of some extra GDI resource consumption
-#ifdef __WXWINCE__
-    // notebooks are never resized under CE anyhow
-    #define USE_NOTEBOOK_ANTIFLICKER    0
-#else
-    #define USE_NOTEBOOK_ANTIFLICKER    1
-#endif
+#define USE_NOTEBOOK_ANTIFLICKER    1
 
 // ----------------------------------------------------------------------------
 // constants
@@ -173,20 +168,9 @@ bool wxNotebook::Create(wxWindow *parent,
 {
     if ( (style & wxBK_ALIGN_MASK) == wxBK_DEFAULT )
     {
-#if defined(__POCKETPC__)
-        style |= wxBK_BOTTOM | wxNB_FLAT;
-#else
         style |= wxBK_TOP;
-#endif
     }
 
-#ifdef __WXWINCE__
-    // Not sure why, but without this style, there is no border
-    // around the notebook tabs.
-    if (style & wxNB_FLAT)
-        style |= wxBORDER_SUNKEN;
-#endif
-
 #if !wxUSE_UXTHEME
     // ComCtl32 notebook tabs simply don't work unless they're on top if we
     // have uxtheme, we can work around it later (after control creation), but
@@ -286,18 +270,6 @@ bool wxNotebook::Create(wxWindow *parent,
     }
 #endif // wxUSE_UXTHEME
 
-    // Undocumented hack to get flat notebook style
-    // In fact, we should probably only do this in some
-    // curcumstances, i.e. if we know we will have a border
-    // at the bottom (the tab control doesn't draw it itself)
-#if defined(__POCKETPC__) || defined(__SMARTPHONE__)
-    if (HasFlag(wxNB_FLAT))
-    {
-        SendMessage(GetHwnd(), CCM_SETVERSION, COMCTL32_VERSION, 0);
-        if (!m_hasBgCol)
-            SetBackgroundColour(*wxWHITE);
-    }
-#endif
     return true;
 }
 
@@ -923,7 +895,6 @@ void wxNotebook::OnSize(wxSizeEvent& event)
         event.Skip();
         return;
     }
-#ifndef __WXWINCE__
     else
     {
         // Without this, we can sometimes get droppings at the edges
@@ -946,7 +917,6 @@ void wxNotebook::OnSize(wxSizeEvent& event)
         rect = wxRect(0, 0, 4, sz.y);
         RefreshRect(rect);
     }
-#endif // !__WXWINCE__
 
     // fit all the notebook pages to the tab control's display area