fix(frontend): 通知が重複して受信される問題を修正 (MisskeyIO#504)

packages/frontend/src/components/MkNotifications.vue

@@ -86,9 +86,6 @@ onMounted(() => {
 
 onActivated(() => {
 	pagingComponent.value?.reload();
-	connection = useStream().useChannel('main');
-	connection.on('notification', onNotification);
-	connection.on('notificationFlushed', reload);
 });
 
 onUnmounted(() => {