You can quickly and easily remove products from lookbooks by using the Edit page.
1. Click the Edit button on the item you'd like to remove from the look
2. Click on "Remove" at the top right of the new window
3. Confirm you'd like to remove the item by clicking "Delete"
The product will disappear as soon as you confirm and you'll be brought back to the rest of the products.
Keep in mind that you'll need to use the extension to add the item back if you change your mind.