CRAS: Remove unused unit test stub
CRAS: Remove unused unit test stub

BUG=none
TEST=this is a test.

Change-Id: Iba0363e0659a271feb71298d98e393bb981c2d86
Signed-off-by: Dylan Reid <c791bfe44996c1eed9c7149a0c5f12a86d58eb85@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/27603
Reviewed-by: Olof Johansson <13dc431ca3b0f062f888def8f8ec4662ec608f7d@chromium.org>

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