declare prop types for ts file

packages/app/src/components/InAppNotification/InAppNotificationDropdown.tsx

@@ -10,11 +10,17 @@ import { InAppNotification as IInAppNotification } from '../../interfaces/in-app
 // import DropdownMenu from './InAppNotificationDropdown/DropdownMenu';
 // import Crowi from 'client/util/Crowi'
 // import { Notification } from 'client/types/crowi'
-import { InAppNotification } from './InAppNotification';
+// import { InAppNotification } from './InAppNotification';
 import SocketIoContainer from '../../client/services/SocketIoContainer';
 
 
-const InAppNotificationDropdown: FC = (props) => {
+type Props = {
+  appContainer: AppContainer,
+  socketIoContainer: SocketIoContainer,
+  me: string,
+};
+
+const InAppNotificationDropdown: FC<Props> = (props: Props) => {
   const { appContainer } = props;
 
   const [count, setCount] = useState(0);
@@ -158,10 +164,4 @@ const InAppNotificationDropdown: FC = (props) => {
  */
 const InAppNotificationDropdownWrapper = withUnstatedContainers(InAppNotificationDropdown, [AppContainer, SocketIoContainer]);
 
-InAppNotificationDropdown.propTypes = {
-  me: PropTypes.string,
-  appContainer: PropTypes.instanceOf(AppContainer).isRequired,
-  socketIoContainer: PropTypes.instanceOf(SocketIoContainer).isRequired,
-};
-
 export default InAppNotificationDropdownWrapper;