generate_au_zip: Remove unused is not used anymore for cros_generate_update_payload.

TEST=Manual procedure, see below.

Manual procedure:
1. In the chroot:
sudo emerge cros-devutils
./build_library/ -o /tmp/`
2. In a new terminal outside the chroot, run sudo and verify it requires
a password (Don't type it).
3. Ran paygen_build_lib._GenerateSinglePayload() with the in /tmp and verify it works.

Change-Id: Ic9aa234307dc81127624dd6da90555e60cb57ff3
Trybot-Ready: Alex Deymo <>
Tested-by: Alex Deymo <>
Reviewed-by: Gabe Black <>
Commit-Queue: Alex Deymo <>
1 file changed