remove dependency of react-async to fix chromatic

Author: Khartir

package.json

@@ -71,7 +71,6 @@
     "npm-run-all": "4.1.5",
     "prettier": "1.18.2",
     "prop-types": "15.7.2",
-    "react-async": "8.0.0",
     "react": "16.10.2",
     "react-dom": "16.10.2",
     "storybook-chromatic": "3.0.3"