'autoGenerateSecretKey' mention removed from upgrade note about `Security`

framework/UPGRADE.md

@@ -136,7 +136,6 @@ configure `itemFile`, `assignmentFile` and `ruleFile`.
               'deriveKeyStrategy' => 'hmac', // for PHP version < 5.5.0
               //'deriveKeyStrategy' => 'pbkdf2', // for PHP version >= 5.5.0
               'useDeriveKeyUniqueSalt' => false,
-              'autoGenerateSecretKey' => true,
           ],
           // ...
       ],