JavaScript

When there is no need for the polyfill it should do nothing. The odd thing to me is that the functions were used directly like a function from a library.

This comes from the days of competing slightly-different polyfills. If you depend on the behaviour of one specific polyfill you don't want to worry about some other package overwriting your polyfill with a different slightly incompatible one, thereby breaking your feature.

Slightly shocking that nobody is doing the maintenance to remove these old redundant polyfills tho.