Copyright Issue - Mompou - remove files

[Carolus]

I just checked. The "Canciones y Danzas" were not published until 1929 by Salabert. Mompou died in 1987, which means his works are definitely under copyright in Canada, and the 1929 publication date (for #1-4 only, the other 8 weren't published until 1949) means that it will be tied up in the USA until 1/1/2025.

[imslp]

Thanks for the note. I've removed the page and files.