make_conf_util: use new gs_fetch_binpkg --boto option

Now that gs_fetch_binpkg has a flag, we don't need the bash/env hack to
pass in the boto auth file.

BUG=None
TEST=precq passes
CQ-DEPEND=CL:271210

Change-Id: I00340c764a489aafe7fc4ba24fc0a21bf744aab3
Reviewed-on: https://chromium-review.googlesource.com/271211
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Paul Hobbs <phobbs@google.com>
Reviewed-by: Nam Nguyen <namnguyen@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
1 file changed