vboot: Remove the never called break

Clean up the code.

BUG=none
BRANCH=none
TEST=N/A

Change-Id: If4ef76edf5f97fc51a21740e1ca51475b27b5f1a
Signed-off-by: Eric Lai <ericr_lai@compal.corp-partner.google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/1897416
Reviewed-by: Julius Werner <jwerner@chromium.org>
1 file changed