Polyfill intl-relativetimeformat only if needed and reduce bundle size

I'm working on an application that needs to use intl-relativetimeformat, intl-listformat and intl-pluralrules. I think we only need to polyfill to continue supporting IE11 but it's blowing up my bundle size by almost 2MB

Is there a way to polyfill these without blowing up the bundle size? The code that polyfills this looks like this:

if (!('RelativeTimeFormat' in Intl)) {
  require('@formatjs/intl-relativetimeformat/polyfill');
  try {
    require(`@formatjs/intl-relativetimeformat/locale-data/${language}`);
  } catch (e) {
    require('@formatjs/intl-relativetimeformat/locale-data/en');
  }
}

I would think with that if statement I wouldn't end up with the entire library in the bundle, but I do. On top of that all locale data is bundled (as opposed to just the locale that is needed):

I'm using webpack 4