Remove unused variables reset by wp_reset_vars(). Many of these haven't been used since b2. see #21767.

git-svn-id: http://core.svn.wordpress.org/trunk@23445 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/admin.php

@@ -77,8 +77,6 @@ set_screen_options();
 $date_format = get_option('date_format');
 $time_format = get_option('time_format');
 
-wp_reset_vars(array('profile', 'redirect', 'redirect_url', 'a', 'text', 'trackback', 'pingback'));
-
 wp_enqueue_script( 'common' );
 
 $editing = false;