scons: drop unused HAVE_STDINT_H macro

This was required back when MSVC didn't support C99 and was missing this
header, but since MSVC 2013 (or maybe earlier?) this isn't it does and
this code isn't doing anything anymore.

Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
4 files changed