Delete labtunnel folder

Package were moved into infra.
https://chromium-review.googlesource.com/c/infra/infra/+/6239715?checksPatchset=11&tab=checks

New version verified by downloading from cipd packages and running labtunnel for DUT device

BUG=b:331254126

Change-Id: I9eecbe658e6c44f6dda54564c22c277b7c8a7467
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/6258260
Reviewed-by: Jason Stanko <jstanko@google.com>
Commit-Queue: Alexandr Astrouski <astrouski@google.com>
Tested-by: Alexandr Astrouski <astrouski@google.com>
31 files changed