runtime: don't define CLOCK_REALTIME in os_hurd.go

It's already defined in sysinfo.go.

Patch by Samuel Thibault.

Fixes https://gcc.gnu.org/PR92861

Change-Id: If56519d81d451249d4c854a20b2b89bd7cabcc5a
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/210538
Reviewed-by: Ian Lance Taylor <iant@golang.org>
1 file changed