Index: src/wp-admin/css/media.css
===================================================================
--- src/wp-admin/css/media.css	(revision 42619)
+++ src/wp-admin/css/media.css	(working copy)
@@ -744,11 +744,7 @@
 	display: block;
 	margin: 0 auto 16px;
 	max-width: 100%;
-	max-height: 90%;
-	max-height: calc( 100% - 42px ); /* leave space for actions underneath */
-	background-image: linear-gradient(45deg, #c4c4c4 25%, transparent 25%, transparent 75%, #c4c4c4 75%, #c4c4c4), linear-gradient(45deg, #c4c4c4 25%, transparent 25%, transparent 75%, #c4c4c4 75%, #c4c4c4);
-	background-position: 0 0, 10px 10px;
-	background-size: 20px 20px;
+	max-height: calc( 100% - 42px );
 }
 
 .edit-attachment-frame .attachment-media-view .attachment-actions {