There are two hover states that you can hide:
1. The zoom effect on hover
2. The overlay hover
To remove both of these - follow this exact order.
Remove the Zoom effect on hover
1. Open Covet.pics and click into your gallery
2. Go to Customize Gallery
3. Under Layout - Style Settings, click the Item Hover tab
4. Change Animation Duration to 0
5. Click Save Changes at the bottom
Remove the Overlay hover
1. open Covet.pics and click into your gallery
2. Go to Customize Gallery
3. Under Layout - Style Settings, click the Item Hover tab
4. Under Hover Style, click the Disable hover effect box.
5. Click Save Changes at the bottom