To remove a track from your playlist, please follow these steps:
Open the Insight Timer app.
Tap the Saved tab (fifth icon at the bottom of the screen).
Select Playlists.
Go to the Mine tab.
Choose the Playlist you would like to edit.
Tap Edit, then select Edit Tracks.
Tap the red minus icon (–) beside the track you want to remove.
Tap Done to save your changes.
The track will be removed from your playlist.