The food laws are abolished yet we are told to be mindful of the weaker brother, not causing him to stumble, whether Jew, Greek or church of God.
Acts 15:21 refers to the Jews living in "every city" including Corinth. So Acts 15:19-20 says the gentiles should follow these proscriptions so as not to cause friction with their Jewish brothers. Verse 19 states that "We should not make it difficult for the Gentiles who are turning to God." WE should not make it difficult. This was a compromise to reduce strife among men, not a statement of the law.
The bible never says such a thing.