How to remove the focus camera button on infobox?

CesiumJS
3

Just note: It seems that currently (Cesium JS 1125) the css to hide the focus camera button needs to be:

button.cesium-infoBox-camera {
  display: none;
}

It seems it is now possible to disable the infoBox Camera Tracking Icon using infoBox viewModel?
However, a simple code example would be appreciated!