Since CL 402595, the Go compiler no longer uses any package under
crypto, so there is no need to explicitly exclude boring from the
go bootstrap build.
Change-Id: Ib71349fffaab151c6e1fb42a9684151439b70cc8
Reviewed-on: https://go-review.googlesource.com/c/go/+/508402
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Run-TryBot: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Bryan Mills <bcmills@google.com>