Revert "CRAS: add GetMinOutputBufferSize dbus API"

This reverts commit f1d6d8f6e9375240cbfbd3885a976b9d95694f23.

Reason for revert: break many CTS/GTS tests (b/64621074)

Original change's description:
> CRAS: add GetMinOutputBufferSize dbus API
>
> BUG=chromium:749345
> TEST=Add a board.ini in cras-config and see chrome read the
>      minimum output buffer size from the config.
>
> Change-Id: I85e511cf7ded092a2ec3848e0c62c15b3da2e578
> Reviewed-on: https://chromium-review.googlesource.com/605340
> Commit-Ready: Wu-Cheng Li <wuchengli@chromium.org>
> Tested-by: Wu-Cheng Li <wuchengli@chromium.org>
> Reviewed-by: Cheng-Yi Chiang <cychiang@chromium.org>
> Reviewed-by: Wu-Cheng Li <wuchengli@chromium.org>

Bug: chromium:749345,b:64621074
Change-Id: Ib9924b84d301cbfa6f68cc4370c7c29adb9c896e
Reviewed-on: https://chromium-review.googlesource.com/611750
Commit-Ready: Kuang-che Wu <kcwu@chromium.org>
Tested-by: Kuang-che Wu <kcwu@chromium.org>
Reviewed-by: Kuang-che Wu <kcwu@chromium.org>
9 files changed