sandbox: remove seccomp-bpf demo program

sandbox: remove seccomp-bpf demo program

The demo program has served its purpose, and it's no longer necessary
to demonstrate how to use seccomp-bpf.

Committed: https://crrev.com/e0dd0295045531750465047312651a30aab5d6a2
Cr-Commit-Position: refs/heads/master@{#293901}

[mdempsky, 2014-09-09 00:54:54]

mdempsky@chromium.org changed reviewers:
+ jln@chromium.org

[jln (very slow on Chromium), 2014-09-09 02:26:05]

The CQ bit was checked by jln@chromium.org

[jln (very slow on Chromium), 2014-09-09 02:26:06]

lgtm

lgtm

[commit-bot: I haz the power, 2014-09-09 02:30:22]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/mdempsky@chromium.org/554743006/1

[commit-bot: I haz the power, 2014-09-09 09:13:36]

Committed patchset #1 (id:1) as 520b94aa6c1e47605afae76741eaadc81b2c137f

[commit-bot: I haz the power, 2014-09-10 03:52:11]

Patchset 1 (id:??) landed as
https://crrev.com/e0dd0295045531750465047312651a30aab5d6a2
Cr-Commit-Position: refs/heads/master@{#293901}