fix `Notification is not defined` on Android Webview or under ios16.4

Kairlec

2023-04-23 ea3f899593f47c1c6fe708495af0a091a3c73d5f

 src/main/java/com/genersoft/iot/vmp/gb28181/event/alarm/AlarmEventListener.java

@@ -51,7 +51,6 @@
                }
                // 移除已关闭的连接
                it.remove();
                // e.printStackTrace();
            }
        }
    }