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/evtloop.cpp

@@ -305,7 +305,6 @@ void wxGUIEventLoop::DoYieldFor(long eventsToProcess)
         bool processNow;
         switch (msg.message)
         {
-#if !defined(__WXWINCE__)
             case WM_NCMOUSEMOVE:
 
             case WM_NCLBUTTONDOWN:
@@ -317,7 +316,6 @@ void wxGUIEventLoop::DoYieldFor(long eventsToProcess)
             case WM_NCMBUTTONDOWN:
             case WM_NCMBUTTONUP:
             case WM_NCMBUTTONDBLCLK:
-#endif
 
             case WM_KEYDOWN:
             case WM_KEYUP:
@@ -346,10 +344,8 @@ void wxGUIEventLoop::DoYieldFor(long eventsToProcess)
             case WM_IME_KEYDOWN:
             case WM_IME_KEYUP:
 
-#if !defined(__WXWINCE__)
             case WM_MOUSEHOVER:
             case WM_MOUSELEAVE:
-#endif
 #ifdef WM_NCMOUSELEAVE
             case WM_NCMOUSELEAVE:
 #endif