Remove test code; good job we have tests

src/components/views/rooms/EventTile.tsx

@@ -451,8 +451,6 @@ export default class EventTile extends React.Component<IProps, IState> {
             client.on("Room.receipt", this.onRoomReceipt);
             this.isListeningForReceipts = true;
         }
-
-        throw new Error("oops");
     }
 
     // TODO: [REACT-WARNING] Replace with appropriate lifecycle event