chore: remove dry_run field from SystemUpdate

Collision with the new dry_run control parameter which does the same thing.

Author: jaredhendrickson13

pfSense-pkg-RESTAPI/files/usr/local/pkg/RESTAPI/Models/SystemUpdate.inc

@@ -12,21 +12,11 @@ use RESTAPI\Fields\BooleanField;
  * Defines a Model that performs a pfSense update operation.
  */
 class SystemUpdate extends Model {
-    public BooleanField $dry_run;
-
     public function __construct(mixed $id = null, mixed $parent_id = null, mixed $data = [], ...$options) {
         # Set model attributes
         $this->many = false;
         $this->always_apply = true;
 
-        # Set model fields
-        $this->dry_run = new BooleanField(
-            default: false,
-            write_only: true,
-            verbose_name: 'Dry Run',
-            help_text: 'Run the pfSense update process in dry-run mode (-n) without applying changes.',
-        );
-
         parent::__construct($id, $parent_id, $data, ...$options);
     }
 
@@ -41,6 +31,6 @@ class SystemUpdate extends Model {
      * Spawns a dispatcher process that performs package update + pfSense upgrade.
      */
     public function apply(): void {
-        (new SystemUpdateDispatcher(async: $this->async))->spawn_process(dry_run: $this->dry_run->value);
+        (new SystemUpdateDispatcher(async: $this->async))->spawn_process(dry_run: $this->dry_run);
     }
 }