diff -r cf61fcea0001 -r c7c34916027a wp/wp-content/themes/twentyfifteen/js/customize-preview.js
--- a/wp/wp-content/themes/twentyfifteen/js/customize-preview.js	Mon Oct 14 17:39:30 2019 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,35 +0,0 @@
-/**
- * Live-update changed settings in real time in the Customizer preview.
- */
-
-( function( $ ) {
-	var $style = $( '#twentyfifteen-color-scheme-css' ),
-		api = wp.customize;
-
-	if ( ! $style.length ) {
-		$style = $( 'head' ).append( '<style type="text/css" id="twentyfifteen-color-scheme-css" />' )
-		                    .find( '#twentyfifteen-color-scheme-css' );
-	}
-
-	// Site title.
-	api( 'blogname', function( value ) {
-		value.bind( function( to ) {
-			$( '.site-title a' ).text( to );
-		} );
-	} );
-
-	// Site tagline.
-	api( 'blogdescription', function( value ) {
-		value.bind( function( to ) {
-			$( '.site-description' ).text( to );
-		} );
-	} );
-
-	// Color Scheme CSS.
-	api.bind( 'preview-ready', function() {
-		api.preview.bind( 'update-color-scheme-css', function( css ) {
-			$style.html( css );
-		} );
-	} );
-
-} )( jQuery );