Unfortunately, you cannot completely delete the "Liked Songs" playlist on Spotify. This is because it's a default playlist where all the songs you've "liked" are automatically stored. However, you can manage this playlist by removing individual songs that you no longer want in there. Here's how:

1. Open Spotify and go to "Your Library."
2. Click on "Liked Songs."
3. Find the song you want to remove.
4. Click on the heart icon next to the song. This will remove the song from your "Liked Songs" playlist.

Remember, if you "like" a song, it will automatically be added to this playlist. So if you want to keep this playlist clean, you might want to avoid liking songs and instead create custom playlists for your favorite tracks.