faft: Remove the customized recovery reboot command

The customized recovery reboot command is a temporary solution for
emulating the Esc+Refresh+Power key combination which trigger a
recovery reboot immediately.

Now we don't use it anymore. So this CL is to remove this support.

BUG=chromium-os:34823
TEST=None, trivial change

Change-Id: I2b539a355ef78102c22c60fa6299ce5cd35a8e21
Reviewed-on: https://gerrit.chromium.org/gerrit/36858
Commit-Ready: Tom Wai-Hong Tam <waihong@chromium.org>
Reviewed-by: Tom Wai-Hong Tam <waihong@chromium.org>
Tested-by: Tom Wai-Hong Tam <waihong@chromium.org>
1 file changed