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

samples/widgets/widgets.cpp

@@ -474,7 +474,6 @@ WidgetsFrame::WidgetsFrame(const wxString& title)
 
     InitBook();
 
-#ifndef __WXHANDHELD__
     // the lower one only has the log listbox and a button to clear it
 #if USE_LOG
     wxSizer *sizerDown = new wxStaticBoxSizer(
@@ -504,12 +503,6 @@ WidgetsFrame::WidgetsFrame(const wxString& title)
     sizerTop->Add(0, 5, 0, wxGROW); // spacer in between
     sizerTop->Add(sizerDown, 0,  wxGROW | (wxALL & ~wxTOP), 10);
 
-#else // !__WXHANDHELD__/__WXHANDHELD__
-
-    sizerTop->Add(m_book, 1, wxGROW | wxALL );
-
-#endif // __WXHANDHELD__
-
     m_panel->SetSizer(sizerTop);
 
     const wxSize sizeMin = m_panel->GetBestSize();
@@ -527,14 +520,10 @@ WidgetsFrame::WidgetsFrame(const wxString& title)
 
 void WidgetsFrame::InitBook()
 {
-#if USE_ICONS_IN_BOOK
     wxImageList *imageList = new wxImageList(ICON_SIZE, ICON_SIZE);
 
     wxImage img(sample_xpm);
     imageList->Add(wxBitmap(img.Scale(ICON_SIZE, ICON_SIZE)));
-#else
-    wxImageList *imageList = NULL;
-#endif
 
 #if !USE_TREEBOOK
     WidgetsBookCtrl *books[MAX_PAGES];
@@ -608,9 +597,7 @@ void WidgetsFrame::InitBook()
 
     GetMenuBar()->Append(menuPages, wxT("&Page"));
 
-#if USE_ICONS_IN_BOOK
     m_book->AssignImageList(imageList);
-#endif
 
     for ( cat = 0; cat < MAX_PAGES; cat++ )
     {
@@ -618,9 +605,7 @@ void WidgetsFrame::InitBook()
         m_book->AddPage(NULL,WidgetsCategories[cat],false,0);
 #else
         m_book->AddPage(books[cat],WidgetsCategories[cat],false,0);
-#if USE_ICONS_IN_BOOK
         books[cat]->SetImageList(imageList);
-#endif
 #endif
 
         // now do add them
@@ -1242,12 +1227,7 @@ WidgetsPage::WidgetsPage(WidgetsBookCtrl *book,
                      wxCLIP_CHILDREN |
                      wxTAB_TRAVERSAL)
 {
-#if USE_ICONS_IN_BOOK
     imaglist->Add(wxBitmap(wxImage(icon).Scale(ICON_SIZE, ICON_SIZE)));
-#else
-    wxUnusedVar(imaglist);
-    wxUnusedVar(icon);
-#endif
 }
 
 /* static */