The maximum value that can be represented by the native word size of the *target* should be irrelevant when compiling tools that run on the build *host*. So drop the definition of MAX_UINTN, now that we no longer use it. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Jaben Carsey <jaben.carsey@intel.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Liming Gao <liming.gao@intel.com>