buffet: Remove unnecessary calls from dbus API

CQ-DEPEND=CL:302649
BUG=b:24267885
TEST=./build_packages --board=gizmo libweave buffet

Change-Id: I8ec3c23c8fa2f52f2056fe5df73de2e8fa02de6c
Reviewed-on: https://chromium-review.googlesource.com/302774
Commit-Ready: Vitaly Buka <vitalybuka@chromium.org>
Tested-by: Vitaly Buka <vitalybuka@chromium.org>
Reviewed-by: Vitaly Buka <vitalybuka@chromium.org>
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
3 files changed