futility: Address double free

The body_sig pointer is being freed twice.  This can lead to
indeterminate behavior and could corrupt memory.  Remove superfluous
free to avoid memory corruption.

BUG=b:250952592
TEST=NA
BRANCH=None

Change-Id: Ie4c11e940653550e24829f253d05be08d74620f6
Signed-off-by: Jon Murphy <jpmurphy@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/3935032
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Hsuan Ting Chen <roccochen@chromium.org>
Commit-Queue: Julius Werner <jwerner@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
2 files changed