Remove Windows CE support.
* configure.ac (HAVE_W32CE_SYSTEM): Remove. * pinentry/pinentry.c [HAVE_W32CE_SYSTEM]: Remove. * secmem/secmem.c [HAVE_W32CE_SYSTEM]: Remove. * secmem/util.c [HAVE_W32CE_SYSTEM]: Remove. * w32/main.c [HAVE_W32CE_SYSTEM]: Remove. * w32/pinentry-w32.rc [HAVE_W32CE_SYSTEM]: Remove.
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>