Remove polyfill.io

[SARodrigues]

Original one is compromised and is no longer of use.

[what-the-diff]

PR Summary

• Removed Unnecessary Script Tag
  The removal of the script tag referring to the 'polyfill.js' file helps streamline the code. This file was not adding value, and its reference was just adding unnecessary complexity. Hence, deleting it simplifies the coding structure and potentially improves the page's loading speed.