image_to_vm.sh: delete unused import

It looks like all users of this were removed in previous commits.

BUG=chromium:1145812
TEST=CQ passes

Change-Id: I038fde27ea6fe525dde0d36e249a72b9bf0ac8a3
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/2648860
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Shao-Chuan Lee <shaochuan@chromium.org>
1 file changed