Right now, there's no way to remove an individual track from a soundtrack or playlist in Soundtrack Business. If a track 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 track (>).
In the tray you can right-click the "Player for Soundtrack Business" icon, and press "Skip track."
If you can't access the device that's playing music, you can also use our remote application for iOS to skip tracks. Learn more about it here.