Hello, Dear Customer!

If you want to hide user icon for testimonials, please click WP Dashboard => Appearance => Customize => Additional CSS and insert here the following code:

blockquote.with_border img {
    display: none;
}

Then click "Publish" button. You will receive the following result: http://nimb.ws/zk0x8Y

Best Regards!

Hello, Dear Al Vidovic!

Could you please provide us with the screenshot of the area, where you want to hide user icons?

In this case add in additional css this code:

.flexslider .slides img {
    width: 100%;
    display: none;
}