gsutil_util: punt

All the users of this have been converted to chromite.lib.gs, so drop it.

BUG=chromium:640609
TEST=precq passes

Change-Id: Iebb9a0ccfcf680d5efcd57dca22fbb7caab97b88
Reviewed-on: https://chromium-review.googlesource.com/1114486
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Congbin Guo <guocb@chromium.org>
Reviewed-by: Xixuan Wu <xixuan@chromium.org>
4 files changed