Update free-courses-pt_BR.md (#3469)

free-courses-pt_BR.md

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 ### Swift
 
-* [Aprenda a fazer apps para iPhone - Swift e Firebase](https://www.udemy.com/aprenda-a-fazer-apps-para-iphone/) - Claudio Zani Silva (Udemy)
 * [Aprendendo Swift do Iniciante ao Avançado. (Mac e Windows)](https://www.udemy.com/aprendendoswift3/) - Lucas Alencar (Udemy)