Decrees of the Holy Office are not irreformable or infallible. This has been demonstrated many times already.
Bravo, you found one decree of the Holy Office that was lifted. Any more?
Maybe it was the teaching of Pius IX that the Church is not capable of allowing discipline that is harmful to souls.
The Holy Office
So, what was the Holy Office of 1616? Well in the wake of the Protestant rebellion, Pope Paul III (1534-1549) set up various congregations to assist the popes in their task of safeguarding the apostolic faith held ‘in agreement with Sacred Scripture and apostolic tradition.’ One of the most important of these was the Supreme Sacred Congregation of the Inquisition, otherwise known as the Congregation of the Holy Office, set up in 1542. The function of this body was specifically to maintain and defend the integrity of the faith, to examine and proscribe errors and false doctrines by way of the censorship of books etc., but most of all to combat heresy at the highest level.
The Congregation of the Index, otherwise known as the Index, was finally established in 1572. It was the section placed by Supreme Sacred Congregation in charge of heretical and offensive book censorship, a practice that had been ongoing since the Council of Trent. Made up of ten cardinals, its decrees were normally signed only by its chief officers.
Later, in 1588; Pope Sixtus V (1585-90) gave the Holy Office even more explicit powers in the Bull Immensa Dei (God who cannot be encompassed). In this directive he made the reigning pope, whoever he may be, Prefect of the Supreme Sacred Congregation of the Inquisition. This gave the Catholic world to understand that decisions assigned to its judgment, before publication, would invariably be examined and ratified by the Pope himself as supreme judge of the Holy See, and would go forward clothed with such formal papal authority.
‘I found it laid down by such distinguished representatives of the Ultramontane school as Cardenas, La Croix, Zaccaria, and Bouix, that Congregational decrees, confirmed by the Pope and published by his express order, emanate from the Pontiff in his capacity of Head of the Church, and are ex cathedrâ in such sense as to make it infallibly certain that doctrines so propounded as true, are true.’ --- Fr W. Roberts.
The 1616 decree, unlike every other decree of the Holy Office recorded in Denzinger's History of dogmas, was the only one that DEFINED an opinion as formal heresy. If it was not a HERESY then why did the Church of 1633 put Galileo on trial for heresy? According to you this is your Catholic Church:
1. Rome, i.e. a Pontifical Congregation acting under the Pope’s order, may put forth a decision that is neither true nor safe.
2. Decrees confirmed by, and virtually included in, a Bull addressed to the Universal Church, may be not only scientifically false, but theologically considered, dangerous, i.e. calculated to prejudice the cause of religion, and compromise the safety of a portion of the deposit committed to the Church’s keeping. In other words, the Pope, in and by a Bull addressed to the whole Church, may confirm and approve, with Apostolic authority, decisions that are false and perilous to the faith.
3. Decrees of the Apostolic See and of Pontifical Congregations may be calculated to impede the free progress of Science. [Condemned by Pius IX in his Syllabus]
4. The Pope’s infallibility is no guarantee that he may not use his supreme authority to indoctrinate the Church with erroneous opinions, through the medium of Congregations he has erected to assist him in protecting the Church from error.
5. The Pope, through the medium of a Pontifical Congregation, may require, under pain of excommunication, individual Catholics to yield an absolute assent to false, unsound, and dangerous propositions. In other words, the Pope, acting as Supreme Judge of the faithful, may, in dealing with individuals, make the rejection of what is in fact the truth, a condition of communion with the Holy See.
6. It does not follow, from the Church’s having been informed that the Pope has ordered a Catholic to abjure an opinion as a heresy, that it is not true and sound.
7. The true interpretation of our Lord’s promises to St. Peter permits us to say that a Pope may, even when acting officially, confirm his brethren the Cardinals, and through them the rest of the Church, in an error as to what is matter of faith.
8. It is not always for the good of the Church that Catholics should submit themselves fully, perfectly, and absolutely, i.e. should yield a full assent, to the decisions of Pontifical Congregations, even when the Pope has confirmed such decisions with his supreme authority, and ordered them published.
If any of the above were true, Catholicism as a divinely guided religion is false.To finish Ladislaus, it is not the likes of you who determine what laws of the Church one should follow and what we can discard, well not for me anyway. The Holy Office confirmed in 1820 that the 1616 decree was not reformable so it was never reformed.