According to
<https://msdn.microsoft.com/en-us/library/windows/desktop/aa383681%28v=vs.85%29.aspx>
("Enabling STRICT"), it is used in combination with including windows.h, so
maybe this #define STRICT (which was there ever since
a934115b "Initial revision," w/o also including
windows.h) was always unnecessary (as reported by clang-cl).

Change-Id: I02cf2584fe2fd52e9513791b18fdf6e7982e89b3