refactor(helpdesk): remove redundant readonly fields from software product form

Code and BC description are already shown in the aside — no need to
duplicate them as readonly inputs in the form.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

modules/helpdesk/pages/helpdesk/software-products/_form.phtml

@@ -12,26 +12,6 @@ $formId = $formId ?? 'software-product-form';
       <fieldset>
         <legend><?php e(t('Product details')); ?></legend>
 
-        <label for="software-product-code"><?php e(t('Code')); ?></label>
-        <input
-          type="text"
-          id="software-product-code"
-          name="code"
-          value="<?php e($values['code'] ?? ''); ?>"
-          readonly
-          aria-readonly="true"
-        >
-
-        <label for="software-product-bc-description"><?php e(t('BC description')); ?></label>
-        <input
-          type="text"
-          id="software-product-bc-description"
-          name="bc_description"
-          value="<?php e($values['bc_description'] ?? ''); ?>"
-          readonly
-          aria-readonly="true"
-        >
-
         <label for="software-product-name"><?php e(t('Product name')); ?></label>
         <input
           type="text"