And drop the un-needed and un-used restart methods.
Only qemu ever used this and actually does it safely.
(From OE-Core rev: 1dd1edb5ea551c8a01538b130aa4d0c361eae14d)
Signed-off-by: Stefan Stanacar <stefanx.stanacar@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>