I am not sure how to remove the readout component completely, but to replace it you can use firefly.util.image.initAutoReadout(readoutComponent, props)
. To see how to use it, search for initAutoReadout
in Javascript Firefly API doc.
I tried firefly.util.image.initAutoReadout(props => null)
to see if it will remove the component completely, but I still see an empty closable popup, when the mouse is over an image. Maybe Trey @roby has more info on how to remove the readout component completely.