Hi @andrea.mattioni, welcome to the Cayenne Community.
If you're still seeing the 'removing' text on any of the default Pi widgets, go to the upper right on your Pi web dashboard, click the settings gear, then 'Reset Dashboard'. I should warn that while this will not lose any of your widgets, it will potentially reset them to a default settings state, so you might need to change things like C vs F or widget type/icons after resetting the dashboard.
It's actually a bug that the default Pi widgets have a 'Remove' button at all. We're hiding it in a future update so you can't get into this state anymore.