Index: wp-content/themes/twentysixteen/style.css
===================================================================
--- wp-content/themes/twentysixteen/style.css	(revision 55900)
+++ wp-content/themes/twentysixteen/style.css	(working copy)
@@ -2487,10 +2487,6 @@
  * 12.0 - Media
  */
 
-.site .avatar {
-	border-radius: 50%;
-}
-
 .entry-content .wp-smiley,
 .entry-summary .wp-smiley,
 .comment-content .wp-smiley,