I do not recall any Apostles denouncing Gods Law and replacing it with their own. They were all Jews. They kept the Sabbath (as well as the other Commandments) all of their life. And I am sure unto their death. Acts 18:4 "In the city of Corinth, the Apostle Paul reasoned in the synagogue every Sabbath, persuading the Jews and Gentiles."
I am sure they met other days of the week as well but nothing there suggests a complete overthrow of Gods Commandment.
I think the council in Acts 15 does not levy this requirement on Gentiles.
Also, do you mean that the Christian still has to cut off the end of his schmeckel?