https://github.com/babel/babel-preset-env/ https://github.com/babel/babel-preset-env/ should help with this to remove the polyfills that are already supported,

https://github.com/babel/babel-preset-env/ https://github.com/babel/babel-preset-env/ should help with this to remove the polyfills that are already supported, and with some future work to remove polyfills are unused.