Update README file

Author: Juanpe Catalán

README.md

@@ -145,5 +145,3 @@ This is an open source project, so feel free to contribute. How?
 ## Author
 
 * Juanpe Catalán [🐦](https://www.twitter.com/juanpecmios)
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-<iframe src="https://docs.google.com/forms/d/e/1FAIpQLScfobKk-QMuUBxQxScQY0ZbvQZWgnqv5cgiUQvqBW0myBpC-Q/viewform?embedded=true" width="760" height="500" frameborder="0" marginheight="0" marginwidth="0">Cargando...</iframe>