Delete/Hide a widget that´s being selected

Hi everyone and thanks for reading.

it´s for a medical appointments app. I want to delete/hide/stop being available a container with certain hour of a certain day, in which is being booked an appointment. I´ve being searching and i haven´t found the way.

The hour is a text field inside a container on a listview, generating children from variable.

I already have conditional visibility to change the color of the widget on tap.

Thanks in advance for your help.