To get to your cart, you can click on the trolley icon as shown below on the top right-hand corner of the web page followed by 'View Cart & Checkout:
Once you are at your checkout page, you will be able to see the itemized details for the product that you have added into the cart followed by an 'X' on the most right-hand side of each product. Click onto the 'X' icon and you will be able to remove the item from your cart.