This feature is available on all Goodshuffle Pro Plans.
While you cannot remove images from a specific item on a Project, you can choose to hide all images on all items on a Project.
You can adjust this setting by clicking the 'Gear' symbol in the top right corner, then selecting the option below
If you have images for an item that you always want hidden from client view, consider removing the image and adding it as a file for the item instead.