devmode-test: drop unused code

This was only invoked by cbuildbot's VMTestStage, and we deleted that
from ToT in Jul 2023.  Drop this code as unused too.

BUG=None
TEST=CQ passes

Change-Id: If7c6f15b45fd011ca029a6343c92216023f6c3b8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crostestutils/+/6511929
Commit-Queue: Dhanya Ganesh <dhanyaganesh@chromium.org>
Reviewed-by: Jae Hoon Kim <kimjae@chromium.org>
Reviewed-by: Dhanya Ganesh <dhanyaganesh@chromium.org>
Auto-Submit: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
4 files changed