Well, a historian of music may be able to answer the question more comprehensively as to the history of that interval being called the "devil in music", but as least as far as the Council of Trent goes, I'm not able to find any text that bans a particular musical interval.
The proceedings of the Council do say, in the 22nd session:
They [the Catholic bishops] shall also banish from churches all those kinds of music, in which, whether by the organ, or in the singing, there is mixed up any thing lascivious or impure; as also all secular actions; vain and therefore profane conversations, all walking about, noise, and clamour, that so the house of God may be seen to be, and may be called, truly a house of prayer.
I'm not aware of any more specificity than that in the Council's decrees, nor how exactly they understand or define "lascivious or impure" music, or "noise and clamour". Hopefully a historian in music can chime in to help with that aspect. I should also note that even it it were explicitly banned, this is speaking about music within the context of Catholic worship, specifically in the Mass, and not all music everywhere - secular music, folk tunes, etc would not be regulated by that.
I talk about the tritone or "devil's interval" in this earlier answer:
First, 11C monk and writer of musical theory Guido of Arezzo (fun fact: credited with inventing the first iteration of do-re-mi) argued for the elimination of a musical element called the tritone, a particularly unharmonious-sounding chord. Music, to the medieval theorists, was harmony, so anything nonharmonious ought to be eliminated from music. Although Guido does not use the term himself, 1702 marks the first known evidence of the tritone's nickname that endures today: Diabolus in musica, the devil in music. But Werckmeister's use of the term suggests it was already in popular useage by that point.