Consider removing polyfill

[cpvalente]

Hi,

I am here following up on an issue where I am migrating a CRA codebase to VITE.

It seems that there is an issue with rollup and the Resize Observer polyfill used.
TypeError: ResizeObserver constructor: 'new' is required
This has been reported in other libraries that use the polyfill and the answer has normally been to remove the polyfill.

Currently ResizeObserver API reaches 94.18% of the browsers.
No code changes needed other than removing the polyfill import

Happy to create a PR if you would like to move this forward