At this time, removing the multiple selection checkboxes is not an option available on the RadListView. We've designed the control to meet the platform guidelines, where on iOS such guidance is to show a checkbox (or similar toggle-able indicator) when in multiple selection mode.
I recommend opening a support ticket here
and ask the dev team if there is a way to access the cell's CheckView from a custom ListViewRenderer so that you can hide it. You also want be able to still show the user that row is selected, so you'll need to update the BackgroundView's coloring when an item is selected and deseletced
Lance | Tech Support Engineer, Sr.
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