Ticket #24013: 24013.diff

wp-admin/css/wp-admin.css

@@ -3998 +3998 @@
         margin-bottom: 20px;
 }
 
+.wp-format-aside .wp-media-buttons .insert-media,
+.wp-format-status .wp-media-buttons .insert-media {
+        display: none;
+}
+
 .mejs-audio audio,
 .mejs-video video {
         display: block;