If you mean removing music from Spotify playlist, you can follow the steps below to make it:
Step 1: Open Spotify and tap Your Library on the button menu bar.
Step 2: Tap Playlists to view Artists and Albums, and all of your playlists.
Step 3: Tap a playlist where there is the song you want to delete.
Step 4: Tap Edit Playlist and navigate to the song you want to delete.
Step 5: Tap the three-dot button on the right of the song name, then choose Remove from this playlist to remove from Spotify music.
If you want to download DRM-free music from Spotify, you may try audio recorder to record the music off.
https://www.leawo.org/music-recorder/?cleartalking=1409