no need to unmount on reconnect (#886)

Author: rmorshea

Diff for: src/client/packages/idom-client-react/src/mount.js

@@ -38,9 +38,6 @@ function mountLayoutWithReconnectingWebSocket(
   socket.onopen = (event) => {
     console.info(`IDOM WebSocket connected.`);
 
-    if (mountState.everMounted) {
-      ReactDOM.unmountComponentAtNode(element);
-    }
     _resetOpenMountState(mountState);
 
     mountLayout(element, {