"Verses missing from the Qur'an"

Anyone heard of this hadith?

[Narrated 'Aisha] "The verse of the stoning and of suckling an adult ten times were revealed, and they were (written) on a paper and kept under my bed. When the messenger of Allah expired and we were preoccupied with his death, a goat entered and ate away the paper."
Musnad Ahmad bin Hanbal. vol. 6. p. 269; Sunan Ibn Majah, p. 626; Ibn Qutbah, Tawil Mukhtalafi 'l-Hadith

I was guessing it's fabricated but someone said Sunnis believe in it. Not really someone I could trust... but yeah has anyone heard of it and the explanation given about it?