Revert "wp++"

This reverts commit 89fcc36fb1.

wp-admin/network/plugin-editor.php

@@ -10,4 +10,7 @@
 /** Load WordPress Administration Bootstrap */
 require_once( dirname( __FILE__ ) . '/admin.php' );
 
+if ( ! is_multisite() )
+	wp_die( __( 'Multisite support is not enabled.' ) );
+
 require( ABSPATH . 'wp-admin/plugin-editor.php' );