Let's worry about a polyfill when we think we need it

app/javascript/packs/frontend.tsx

@@ -1,4 +1,3 @@
-import 'core-js/stable';
 import React from 'react';
 import {render} from 'react-dom';
 

package.json

@@ -36,7 +36,6 @@
     "@rails/ujs": "^6.0.0-alpha",
     "@rails/webpacker": "^4.0.7",
     "bootstrap": "^4.3.1",
-    "core-js": "^3.1.3",
     "farce": "^0.2.8",
     "found": "^0.4.0-alpha.17",
     "found-relay": "^0.4.0-alpha.8",