Apply suggestion from @michalsn

Co-authored-by: Michal Sniatala <michal@sniatala.pl>

Author: gr8man

system/Common.php

@@ -467,7 +467,6 @@ function esc($data, string $context = 'html', ?string $encoding = null)
             foreach ($data as &$value) {
                 $value = esc($value, $context, $encoding);
             }
-            unset($value); // Prevent reference leak: &$value would remain bound to last element
 
             return $data;
         }