Danielle Bradbery dropped a new single, “Goodbye Summer,” featuring Thomas Rhett. The mid-tempo song is a re-imagining of “Hello Summer,” which was featured on Danielle’s 2017 sophomore album, I Don’t Believe We’ve Met Thomas Rhett co-wrote the original rendition with Rhett Akins, Julian Bunetta and Jaren Johnston. “Thomas Rhett was one of the first mentors…