Remove polyfill.io from readme (#1108)

Author: silesky

packages/consent/consent-wrapper-onetrust/README.md

@@ -120,9 +120,3 @@ In order to get full ie11 support, you are expected to bring your own polyfills.
 ```html
 <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-polyfill/7.7.0/polyfill.min.js"></script>
 ```
-
-or
-
-```html
-<script src="https://polyfill.io/v3/polyfill.min.js?features=es5,es2015,es2016,es2017,es2018,es2019,es2020&flags=gated"></script>
-```