What a bunch of hooey! Everything that was written in the law of Moses was to be kept under that covenant. The only reason that you are saying this is because Acts 15 supports salvation by grace through faith apart from the works of the law. The claim by those believer's of the Pharisee group were teaching that Gentile believer's in Christ must be circumcised and made to obey the law of Moses, the whole law, which includes all 600 plus of them. And Peter's answer to this was:
"God, who knows the heart, showed that he accepted them by giving the Holy Spirit to them, just as he did to us.
9He did not discriminate between us and them, for he purified their hearts by faith. Now then, why do you try to test God by putting on the necks of Gentiles a yoke that neither we nor our ancestors have been able to bear? No! We believe it is through the grace of our Lord Jesus that we are saved, just as they are.”
The only reason that you are saying that the old covenant did include the whole law is to circumvent the proof that we are saved by grace though faith, because that is what this scripture supports. It is a common tactic to circumvent and distort the scriptures that give proof, regardless of what the topic is.
If we are having faith in Christ and are led by the Spirit, we are not going to be doing the above.