Hi Bailey,

I hope you are well today and thank you for your question.

You can remove it by adding the following CSS code in the Custom CSS code option of your theme on the below path.

Admin Area -> Appearance -> Theme Settings -> Custom Code -> CSS Code

 .post-thumbnail,
 .post-thumbnail img,
 .post-thumbnail .sh-ratio-content,
 .post-switch-item,
 .sh-widget-instagram-item img,
 .sh-widget-instagram-item-overlay,
 .sh-read-later-thumbnail,
 .sh-read-later-thumbnail:after,
 .sh-overlay-style1,
 .sh-comment-form,
 .post-media-play-overlay,
 .post-media-play-overlay:after,
 .post-quote-link .sh-ratio-content,
 .post-gallery-list,
 .post-gallery-list .slick-list,
 .post-switch-item:after,
 .widget_facebook iframe,
 .sh-widget-facebook-overlay,
 .sh-widget-posts-slider-thumbnail,
 .sh-widget-posts-slider-group-style2,
 .sh-widget-posts-slider-group-style2 .slick-list.draggable,
 .post-content-review-details,
 .post-content-review-progressbar-graph,
 .post-content-review-progressbar-graph-fill,
 .sh-post-author,
 .post-content-share .jssocials-share,
 .sh-comment-form input,
 .sh-comment-form textarea,
 .post-content img {
 	border-radius: 0 !important;
 }

Best regards,
Shufflehound team