In a post on her website, the “Big Yellow Taxi” singer said she was supporting Young, who clashed with Spotify over its wildly popular “Joe Rogan Experience” podcast. “I’ve decided to remove all my music from Spotify,” Mitchell wrote. “Irresponsible people are spreading lies that are costing people their lives. “I stand in solidarity with Neil Young and the global scientific and medical communities on this issue.” Mitchell’s website also carried a copy of an open letter to Spotify by medics and other scientists calling on the company to establish a misinformation policy to combat Rogan’s repea…