faft: Remove firmware_ECAdc from suites

The command needed for this test is disabled by default. Let's remove it
from suites.

BUG=chrome-os-partner:35902
TEST=none

Change-Id: Iff56614a2dc82ef190b382275a6326fd32e88543
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/37429
Reviewed-by: Tom Wai-Hong Tam <waihong@chromium.org>
1 file changed