Get rid of this variable since its not being used.

resources/classes/cache.php

@@ -10,11 +10,6 @@
  */
 class cache {
 
-	/**
-	 * @var string $zzz		description for the variable
-	 */
-	//private $zzz;
-
 	/**
 	 * Called when the object is created
 	 */