It was never published by the Church which is the standard for doctrine.
Says who?
The Church itself for many decades now through various channels such as the Teacher preparation class and it's manual
Teaching, No Greater Call. The various parts of which have been recently summarized:
Not every statement made by a Church leader, past or present, necessarily constitutes doctrine. A single statement made by a single leader on a single occasion often represents a personal, though well-considered, opinion, but is not meant to be officially binding for the whole Church.
With divine inspiration, the First Presidency (the prophet and his two counselors) and the Quorum of the Twelve Apostles (the second-highest governing body of the Church) counsel together to establish doctrine that is consistently proclaimed in official Church publications. This doctrine resides in the four “standard works” of scripture (the Holy Bible, the Book of Mormon, the Doctrine and Covenants and the Pearl of Great Price), official declarations and proclamations, and the Articles of Faith. Isolated statements are often taken out of context, leaving their original meaning distorted.
Approaching Mormon DoctrineLook, we all get that you are embarrassed by certain teachings of the people you revere as prophets, seers and revelators....I find it hilarious that you have to create some outlandish mental construct and ridiculous rules in order to justify the stupidity that your "prophets" spew forth...Please, continue with your ridiculous rationalizations - we are definitely laughing at you, not with you....
I'm simply going by what the Church itself says about it's own doctrine.