Fix warning test

Author: Jack Pope

packages/react-test-renderer/src/__tests__/ReactTestRenderer-test.internal.js

@@ -65,6 +65,7 @@ describe('ReactTestRenderer', () => {
     );
   });
 
+  // @gate __DEV__
   it('should not warn if enableReactTestRendererWarning is enabled but the RN global is set', () => {
     global.IS_REACT_NATIVE_TEST_ENVIRONMENT = true;
     ReactFeatureFlags.enableReactTestRendererWarning = true;