u/Competitive-Wish8015

I'm in quite the predicament. I originally planned to have an intro to my song, so naturally, I left 20 seconds of silence at the beginning of my song to fill in. Turns out I don't want the intro anymore and now I'm stuck with 20 seconds of silence. Is there any way to collectively move all my tracks to the left? Is there any way to remove that silence within the app?