fix (lobby): Remove _onSendMessage base method from LobbyChatScreen

react/features/lobby/components/native/LobbyChatScreen.tsx

@@ -39,8 +39,6 @@ class LobbyChatScreen extends
             </JitsiScreen>
         );
     }
-
-    _onSendMessage: () => void;
 }
 
 export default translate(connect(abstractMapStateToProps)(LobbyChatScreen));