update Port Placement module to remove testing buttons

revision comparison:

https://github.com/giogadi/PortPlacement/compare/giogadi:48b20ae48fcf02ed85b7ba9abf910e0edc92a9b3%E2%80%A6giogadi:9cbdb41cad988b186aab6ae3e0a0a4d23db82fe7

(Sorry, JC!)