Oh that's good that you've found easysong.com as a useful resource. I'd probably suggest tweaking articles rather than deleting them, but whatever makes you feel comfortable. There may be some leeway in reviewing, but it's still recommended that you get permission. I've done another story on that here: https://medium.com/illumination/writer-had-to-pay-over-4000-for-using-song-lyrics-in-book-1b99ce6164a3