Right now, there's no way to remove an individual song from a soundtrack or playlist in Soundtrack Business. If a song is playing that you don't like, you can easily skip it.
Android and iOS
Open the app and tap on the symbol for skipping a song (>|).
In the tray on the bottom right next to your time, you can right-click the "Player for Soundtrack Business" icon and press "Skip song."
If you can't access the device that's playing music, you can also use our remote application for iOS to skip songs. Learn more about it here.