image_to_vm.sh: delete unused build_common.sh

None of the funcs in here are used anymore, so stop loading it.

BUG=chromium:1145812
TEST=CQ passes

Change-Id: I1040106d52f1d161fafb1b814882a2e0649d37e3
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/2648862
Tested-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Shao-Chuan Lee <shaochuan@chromium.org>
Reviewed-by: Shao-Chuan Lee <shaochuan@chromium.org>
1 file changed