To Archive or Delete a song, tap it in your Library, then tap/click the Info icon in the top navigation, followed by the Edit (pencil) icon in the top navigation.

Scroll to the bottom of this screen to find the Danger Zone.

Archiving

Archiving a Song hides it from your Library, but doesn’t delete any of the associated data or attachments. This is useful if a song is not active in your repertoire any more, but you want to keep it around to potentially reuse later.

Deleting

Deleting songs is permanent and cannot be undone. Only do this if you want to completely remove all data for a Song, including attachments, from your Library.