diff --git a/src/wp-includes/class-wp-customize-widgets.php b/src/wp-includes/class-wp-customize-widgets.php
index f52d59418a..ecddb3a620 100644
--- a/src/wp-includes/class-wp-customize-widgets.php
+++ b/src/wp-includes/class-wp-customize-widgets.php
@@ -735,7 +735,6 @@ class WP_Customize_Widgets {
 			'i18n' => array(
 				'widget_tooltip' => __( 'Press shift and then click to edit widget in customizer...' ),
 			),
-			'request_uri' => wp_unslash( $_SERVER['REQUEST_URI'] ),
 		);
 		foreach ( $exports['registered_widgets'] as &$registered_widget ) {
 			unset( $registered_widget['callback'] ); // may not be JSON-serializeable
diff --git a/src/wp-includes/js/customize-preview-widgets.js b/src/wp-includes/js/customize-preview-widgets.js
index 5b10c2af28..004785174e 100644
--- a/src/wp-includes/js/customize-preview-widgets.js
+++ b/src/wp-includes/js/customize-preview-widgets.js
@@ -9,9 +9,6 @@ var WidgetCustomizerPreview = (function ($) {
 		registered_sidebars: [], // @todo Make a Backbone collection
 		registered_widgets: {}, // @todo Make array, Backbone collection
 		widget_selectors: [],
-		render_widget_ajax_action: null,
-		render_widget_nonce_value: null,
-		render_widget_nonce_post_key: null,
 		preview: null,
 		i18n: {},