Remove compile+test+luci configs for Linux Xenial buildbot.

Moved to luci. Also added compile config for linux-xenial-rel
trybot.

Bug: 812051
Change-Id: I861172d85d9df1149e1a0e2a36e4e0da43b5b952
Reviewed-on: https://chromium-review.googlesource.com/1066150
Reviewed-by: John Budorick <jbudorick@chromium.org>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#559911}
8 files changed