autotest-tests: stop packaging platform_KernelVersionByBoard

This test is in the process of being removed.

BUG=b:154869525
TEST=none

Change-Id: I377d940e051d0c1b75a2384741372372f2694755
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/2255285
Tested-by: Ross Zwisler <zwisler@google.com>
Auto-Submit: Ross Zwisler <zwisler@google.com>
Reviewed-by: Katherine Threlkeld <kathrelkeld@chromium.org>
Commit-Queue: Ross Zwisler <zwisler@google.com>
1 file changed