The promo, soundtracked by Swift's 'Evermore' title track, hypes up US athletes Sunisa Lee and Jade Carey
"Thank you for all you have done to make this album what it was"
A Republic Records rep said Swift's team will instead focus on her 2020 album 'Evermore'
The band's second album 'A Hero's Death' went head-to-head with 'Folklore' last July
Swift previously spoke out against Blackburn's voting record on minority and LGBTQ rights in 2018
The writers have been credited for the song's verse, which Rodrigo previously admitted takes inspiration from Swift's 'Cruel Summer'
Fans of both artists turned into online sleuths over the weekend
I was wondering if after all these years you'd like to collaborate
However, video of the incident is still available to view online
Unreleased track 'Birch' is the second song Swift appears on from the upcoming Big Red Machine album