fix(modal): align rollout schema contract

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/Settings/DomainGroups.php

@@ -179,12 +179,4 @@ trait DomainGroups {
         return Capabilities::get_system_tools_settings();
     }
 
-    /**
-     * 获取前台弹窗按领域灰度开关。
-     *
-     * @return array{identity:bool,badges:bool,orders:bool,vip:bool}
-     */
-    public static function get_frontend_modal_rollout_settings(): array {
-        return ModalRuntime::get_frontend_modal_rollout_settings();
-    }
 }