To delete an image, simply click on the image you'd like to remove, then click on the "Delete" button at the bottom left of the pop-up window that appears.
Alternatively, you can click on the drop-down arrow at the bottom right of the image to delete it.
You can also delete multiple photos at the same time by first ticking the boxes in the upper left-hand corner of each photo, and then clicking on the "Delete" button above the main image.
To learn how to do it, please check this tutorial. Press the button to start!
For more information, watch the video: