Go to your profile dashboard and find the "My Projects" tab. Find the "Gear" icon of the project you intend to modify. Click the "Edit Project" option and select the "Edit Works" tab. To delete a single photo, hover your cursor over and click the "Trash Bin" icon on the respective photo. You may delete several photos at a time by hovering your cursor over and individually clicking the "Circle" icon to select photos. Click the "Delete" button on the top-right of the page to delete your selection of photos. Don't forget to click "Save Changes" when you're done.