punt unused crypto code

We don't actually compile the sha512 code, so drop it and related.

BUG=chromium:878440
TEST=build works

Change-Id: Ic664db4194f44c27f1a412cdb03b07fd21cf298d
Reviewed-on: https://chromium-review.googlesource.com/1201046
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
3 files changed