chore: remove polyfill io (#4270)

platform/docs/docs/platform/browser-support.md

@@ -37,9 +37,7 @@ language feature yet. Our earlier transpilation will rectify _syntax_
 discrepancies, but unimplemented features require a "temporary" implementation.
 That's where polyfills step in.
 
-You can utilize a service like [polyfill.io](https://polyfill.io/v3/) to
-auto-detect and apply polyfills as needed, or you can update the PWA build to
-include polyfill's in your bundle by incorporating [core-js][core-js]
+We previously used polyfill io, but due to a security vulnerability in the library, it's necessary to switch to alternative services.
 
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platform/docs/versioned_docs/version-2.0-deprecated/faq/browser-support.md

@@ -37,9 +37,6 @@ language feature yet. Our earlier transpilation will rectify _syntax_
 discrepancies, but unimplemented features require a "temporary" implementation.
 That's where polyfills step in.
 
-You can utilize a service like [polyfill.io](https://polyfill.io/v3/) to
-auto-detect and apply polyfills as needed, or you can update the PWA build to
-include polyfill's in your bundle by incorporating [core-js][core-js]
 
 <!--
   Links