timer.h: remove some duplicate constants

we can get these time unit/scalar constants from stddef.h which we get
for free by including libpayload.h.  no need to define them in
timer.h.  bonus feature: timer.h no longer executable.

BRANCH=none
BUG=none
TEST=rebuilt depthcharge for reef ; verified all use sites already
	include libpayload.h

Change-Id: Idbeb035e8f4f5e5c9347eb1025d94c85f75cc2ce
Signed-off-by: Caveh Jalali <caveh@google.com>
Reviewed-on: https://chromium-review.googlesource.com/620279
Reviewed-by: Julius Werner <jwerner@chromium.org>
1 file changed