You can easily remove a user photo in the Testimonial block. Here's how you can do it:
1. Hover over any area of the block with testimonials to activate the block editing menu.
2. Click on "gear" Block settings icon.
3. To remove photos from testimonials or review, deselect the option Author photo.
4. Click Save to apply changes.
Tip: You can also remove the icon that appears next to the photo in the same area of Block settings. Just deselect the option Testimonial icon and click Save.
Learn more about managing the Testimonials block in this tutorial.