Index: /trunk/src/wp-admin/includes/update-core.php
===================================================================
--- /trunk/src/wp-admin/includes/update-core.php	(revision 62782)
+++ /trunk/src/wp-admin/includes/update-core.php	(revision 62783)
@@ -901,6 +901,10 @@
 	'wp-includes/collaboration',
 	'wp-includes/collaboration.php',
-	'wp-includes/js/dist/sync.js',
-	'wp-includes/js/dist/sync.min.js',
+	/*
+	 * Added back in 7.1.
+	 *
+	 * 'wp-includes/js/dist/sync.js',
+	 * 'wp-includes/js/dist/sync.min.js',
+	 */
 );