[mhagemeister]

They are unfortunately not removed, because the way they are used makes it difficult for bundlers to detect them.

Deno encourages you to submit the original sources which can be even in TypeScript if you want. The users are very close to the newest Deno release and there is barely anyone staying on old versions. This works because Deno takes semver very seriously, which in turn encourages folks to upgrade. It removes the need for polyfills and allows you to always use the latest JS features.

Disclaimer: I work at Deno