The prohibition of eating sacrificial meat for more than three days, which applied at the beginning of Islam but was then abrogated, and now it is permissible to eat it as long as one wants.
وَحَدَّثَنِي حَجَّاجُ بْنُ الشَّاعِرِ، حَدَّثَنَا الضَّحَّاكُ بْنُ مَخْلَدٍ، عَنْ سُفْيَانَ، عَنْ عَلْقَمَةَ، بْنِ مَرْثَدٍ عَنِ ابْنِ بُرَيْدَةَ، عَنْ أَبِيهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " كُنْتُ نَهَيْتُكُمْ " . فَذَكَرَ بِمَعْنَى حَدِيثِ أَبِي سِنَانٍ .
Ibn Buraida, on the authority of his father, reported Allah's Messenger (ﷺ) having said this: I used to forbid you. The rest of the hadith is the same.