Gate tests

We don't warn for the www entry point.

Author: sebmarkbage

packages/react-dom/src/__tests__/ReactDOMRoot-test.js

@@ -47,6 +47,7 @@ describe('ReactDOMRoot', () => {
     expect(container.textContent).toEqual('Hi');
   });
 
+  // @gate !www
   it('warns if you import createRoot from react-dom', async () => {
     expect(() => ReactDOM.createRoot(container)).toErrorDev(
       'You are importing createRoot from "react-dom" which is not supported. ' +
@@ -57,6 +58,7 @@ describe('ReactDOMRoot', () => {
     );
   });
 
+  // @gate !www
   it('warns if you import hydrateRoot from react-dom', async () => {
     expect(() => ReactDOM.hydrateRoot(container, null)).toErrorDev(
       'You are importing hydrateRoot from "react-dom" which is not supported. ' +