How to Remove Cogwheel Icon when Hovering on Product Image

Hi there,

I would like to know how to remove the cogwheel icon that appears in the bottom-right corner of the product preview image when hovering over a product in the shop catalogue view?

(Please see screenshot for illustration and context: http://www.jbird-fashion.com/wp-content/uploads/2015/06/Screen-shot-2015-06-02-at-10.33.23-PM.png)

Is there a setting that can be changed to remove this icon?
If not, perhaps you could assist me with a custom CSS code that could remove this icon?

Many thanks,

Tim