au_test_harness: drop unused project

There doesn't seem to be any references to this in the tree,
so punt it.

BUG=None
TEST=CQ passes

Change-Id: I1d788230c407a7da3cc2ef8ee29749a4ed88e4a7
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crostestutils/+/4672151
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Jae Hoon Kim <kimjae@chromium.org>
Reviewed-by: Dhanya Ganesh <dhanyaganesh@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
12 files changed