Remove malicious polyfill.io usage

README.md

@@ -1106,18 +1106,10 @@ example.setChoiceByValue('Two'); // Choice with value of 'Two' has now been sele
 
 Choices is compiled using [Babel](https://babeljs.io/) targeting browsers [with more than 1% of global usage](https://github.com/jshjohnson/Choices/blob/master/.browserslistrc) and expecting that features [listed below](https://github.com/jshjohnson/Choices/blob/master/.eslintrc.json#L62) are available or polyfilled in browser.
 You may see exact list of target browsers by running `npx browserslist` within this repository folder.
-If you need to support a browser that does not have one of the features listed below,
-I suggest including a polyfill from the very good [polyfill.io](https://polyfill.io/v3/):
-
-**Polyfill example used for the demo:**
-
-```html
-<script src="https://cdn.polyfill.io/v3/polyfill.min.js?features=Array.from%2Ces5%2Ces6%2CSymbol%2CSymbol.iterator%2CDOMTokenList%2CObject.assign%2CCustomEvent%2CElement.prototype.classList%2CElement.prototype.closest%2CElement.prototype.dataset%2CArray.prototype.find%2CArray.prototype.includes"></script>
-```
 
 **Features used in Choices:**
 
-```polyfills
+```
 Array.from
 Array.prototype.find
 Array.prototype.includes

public/index.html

@@ -46,10 +46,6 @@
     <link rel="stylesheet" href="assets/styles/base.min.css" />
     <!-- End ignore these -->
 
-    <!-- Optional includes -->
-    <script src="https://cdn.polyfill.io/v3/polyfill.min.js?features=Array.from%2Ces5%2Ces6%2CSymbol%2CSymbol.iterator%2CDOMTokenList%2CObject.assign%2CCustomEvent%2CElement.prototype.classList%2CElement.prototype.closest%2CElement.prototype.dataset%2CArray.prototype.find%2CArray.prototype.includes%2Cfetch"></script>
-    <!-- End optional includes -->
-
     <!-- Choices includes -->
     <link rel="stylesheet" href="assets/styles/choices.min.css" />
     <script src="assets/scripts/choices.js"></script>