Fix one minor issue with vfkit error handling. First checking if err !=
nil OR errors.Is() is pointless as the err != is already true.
Second nilerr complains because we return nil when we hit an error
branch, in this case this is correct because an error means VM is
stopped.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
84a85319e1