fix: remove unnecessary value fields from ProposalPricingService

app/Services/ProposalPricingService.php

@@ -14,17 +14,8 @@ class ProposalPricingService
 {
     private const VALUE_FIELDS = [
         'registration_value',
-        'registration_included_in_course',
-        'registration_installments_allowed',
-        'registration_max_installments',
         'classes_value',
-        'classes_included_in_course',
-        'classes_installments_allowed',
-        'classes_max_installments',
         'classes_discount_percentage',
-        'materials_included_in_course',
-        'materials_installments_allowed',
-        'materials_max_installments',
         'total_value',
         'total_max_installments',
     ];