Customizer: Remove a `throw error` call which prevents further actions, like `jqxhr.always()`.

props westonruter.
fixes #31501.
Built from https://develop.svn.wordpress.org/trunk@31816


git-svn-id: http://core.svn.wordpress.org/trunk@31798 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/customize-widgets.js

@@ -1852,12 +1852,7 @@
 			controlContainer.slideDown( function() {
 				if ( isExistingWidget ) {
 					widgetFormControl.updateWidget( {
-						instance: widgetFormControl.setting(),
-						complete: function( error ) {
-							if ( error ) {
-								throw error;
-							}
-						}
+						instance: widgetFormControl.setting()
 					} );
 				}
 			} );

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.2-beta1-31815';
+$wp_version = '4.2-beta1-31816';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.